General Battery Information

All battery claims depend on the cellular network, location, signal strength, feature configuration, usage and many other factors; actual results will vary. Battery has limited recharge cycles and may eventually need to be replaced. Battery life and charge cycles vary by use and settings. Battery tests are conducted using specific ³ÉÈ˰æ91ÊÓÆµ units. See apple.com/in/batteries and apple.com/in/iphone/compare for more information.

Talk Time Tests

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2018 using pre-production ³ÉÈ˰æ91ÊÓÆµ XS, ³ÉÈ˰æ91ÊÓÆµ XS Max and ³ÉÈ˰æ91ÊÓÆµ XR units and software, on both GSM and CDMA carrier networks. Talk Time tests were conducted over a Voice over LTE (VoLTE) network. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2017 using pre-production ³ÉÈ˰æ91ÊÓÆµ 8, ³ÉÈ˰æ91ÊÓÆµ 8 Plus and ³ÉÈ˰æ91ÊÓÆµ X units and software, on both GSM and CDMA carrier networks. Talk Time tests were conducted over a 3G voice network. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ 7 and ³ÉÈ˰æ91ÊÓÆµ 7 Plus units and software, on both GSM and CDMA carrier networks. Talk Time tests were conducted over a 3G voice network. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin March 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (1st generation) units and software, on both GSM and CDMA carrier networks. Talk Time tests were conducted over a 3G voice network. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2015 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6s and ³ÉÈ˰æ91ÊÓÆµ 6s Plus units and software, on both GSM and CDMA carrier networks. Talk Time tests were conducted over a 3G voice network. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2014 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6 and ³ÉÈ˰æ91ÊÓÆµ 6 Plus units and software, on both GSM and CDMA carrier networks. Talk Time tests were conducted over a 3G voice network. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Standby Time Tests

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ 7 and ³ÉÈ˰æ91ÊÓÆµ 7 Plus units and software, on both GSM and CDMA carrier networks. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off. Hey Siri was not enabled. When Hey Siri is enabled, standby time is up to 9 days on ³ÉÈ˰æ91ÊÓÆµ 7 and 15 days on ³ÉÈ˰æ91ÊÓÆµ 7 Plus.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin March 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (1st generation) units and software, on both GSM and CDMA carrier networks. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off. Hey Siri was not enabled. When Hey Siri is enabled, standby time is up to 10 days on ³ÉÈ˰æ91ÊÓÆµ SE.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2015 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6s and ³ÉÈ˰æ91ÊÓÆµ 6s Plus units and software, on both GSM and CDMA carrier networks. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off. Hey Siri was not enabled. When Hey Siri is enabled, standby time is up to 9 days on ³ÉÈ˰æ91ÊÓÆµ 6s and up to 15 days on ³ÉÈ˰æ91ÊÓÆµ 6s Plus.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2014 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6 and ³ÉÈ˰æ91ÊÓÆµ 6 Plus units and software, on both GSM and CDMA carrier networks. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks was turned off.

Video Playback Tests

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin December 2024 and January 2025 using pre-production ³ÉÈ˰æ91ÊÓÆµ 16e units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin July and August 2024 using pre-production ³ÉÈ˰æ91ÊÓÆµ 16, ³ÉÈ˰æ91ÊÓÆµ 16 Plus, ³ÉÈ˰æ91ÊÓÆµ 16 Pro and ³ÉÈ˰æ91ÊÓÆµ 16 Pro Max units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin July and August 2023 using pre-production ³ÉÈ˰æ91ÊÓÆµ 15, ³ÉÈ˰æ91ÊÓÆµ 15 Plus, ³ÉÈ˰æ91ÊÓÆµ 15 Pro and ³ÉÈ˰æ91ÊÓÆµ 15 Pro Max units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin July and August 2022 using pre-production ³ÉÈ˰æ91ÊÓÆµ 14, ³ÉÈ˰æ91ÊÓÆµ 14 Plus, ³ÉÈ˰æ91ÊÓÆµ 14 Pro and ³ÉÈ˰æ91ÊÓÆµ 14 Pro Max units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin January 2022 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (3rd generation) units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2021 using pre-production ³ÉÈ˰æ91ÊÓÆµ 13 mini, ³ÉÈ˰æ91ÊÓÆµ 13, ³ÉÈ˰æ91ÊÓÆµ 13 Pro and ³ÉÈ˰æ91ÊÓÆµ 13 Pro Max units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August and September 2020 using pre-production ³ÉÈ˰æ91ÊÓÆµ 12 mini, ³ÉÈ˰æ91ÊÓÆµ 12, ³ÉÈ˰æ91ÊÓÆµ 12 Pro and ³ÉÈ˰æ91ÊÓÆµ 12 Pro Max units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. Video playback (streamed) consisted of a repeated 3-hour 1-minute movie purchased from the iTunes Store. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin February 2020 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (2nd generation) units and software, on both GSM and CDMA carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. Video playback (streamed) consisted of a repeated 3-hour 1-minute movie purchased from the iTunes Store. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2019 using pre-production ³ÉÈ˰æ91ÊÓÆµ 11, ³ÉÈ˰æ91ÊÓÆµ 11 Pro and ³ÉÈ˰æ91ÊÓÆµ 11 Pro Max units and software, on both GSM and CDMA carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. Video playback (streamed) consisted of a repeated 3-hour 1-minute movie purchased from the iTunes Store. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2018 using pre-production ³ÉÈ˰æ91ÊÓÆµ XS, ³ÉÈ˰æ91ÊÓÆµ XS Max and ³ÉÈ˰æ91ÊÓÆµ XR units and software, on both GSM and CDMA carrier networks. Video content consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2017 using pre-production ³ÉÈ˰æ91ÊÓÆµ 8, ³ÉÈ˰æ91ÊÓÆµ 8 Plus and ³ÉÈ˰æ91ÊÓÆµ X units and software, on both GSM and CDMA carrier networks. Video content consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness and True Tone were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ 7 and ³ÉÈ˰æ91ÊÓÆµ 7 Plus units and software, on both GSM and CDMA carrier networks. Video content consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin March 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (1st generation) units and software, on both GSM and CDMA carrier networks. Video content consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2015 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6s and ³ÉÈ˰æ91ÊÓÆµ 6s Plus units and software, on both GSM and CDMA carrier networks. Video content consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2014 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6 and ³ÉÈ˰æ91ÊÓÆµ 6 Plus units and software, on both GSM and CDMA carrier networks. Video content consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store. All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Audio Playback Tests

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin December 2024 and January 2025 using pre-production ³ÉÈ˰æ91ÊÓÆµ 16e units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding), tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin July and August 2024 using pre-production ³ÉÈ˰æ91ÊÓÆµ 16, ³ÉÈ˰æ91ÊÓÆµ 16 Plus, ³ÉÈ˰æ91ÊÓÆµ 16 Pro and ³ÉÈ˰æ91ÊÓÆµ 16 Pro Max units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding), tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off. ³ÉÈ˰æ91ÊÓÆµ 16 Pro and ³ÉÈ˰æ91ÊÓÆµ 16 Pro Max were tested with Always-On display enabled but with the display not visible; audio playback time will decrease when Always-On display is visible, compared to playback time when the display is face down on a surface or in a pocket or bag.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin July and August 2023 using pre-production ³ÉÈ˰æ91ÊÓÆµ 15, ³ÉÈ˰æ91ÊÓÆµ 15 Plus, ³ÉÈ˰æ91ÊÓÆµ 15 Pro and ³ÉÈ˰æ91ÊÓÆµ 15 Pro Max units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding), tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off. ³ÉÈ˰æ91ÊÓÆµ 15 Pro and ³ÉÈ˰æ91ÊÓÆµ 15 Pro Max were tested with Always-On display enabled but with the display not visible; audio playback time will decrease when Always-On display is visible, compared to playback time when the display is face down on a surface or in a pocket or bag.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin July and August 2022 using pre-production ³ÉÈ˰æ91ÊÓÆµ 14, ³ÉÈ˰æ91ÊÓÆµ 14 Plus, ³ÉÈ˰æ91ÊÓÆµ 14 Pro and ³ÉÈ˰æ91ÊÓÆµ 14 Pro Max units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding), tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off. ³ÉÈ˰æ91ÊÓÆµ 14 Pro and ³ÉÈ˰æ91ÊÓÆµ 14 Pro Max were tested with Always-On display enabled but with the display not visible; audio playback time will decrease when Always-On display is visible, compared to playback time when the display is face down on a surface or in a pocket or bag.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin January 2022 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (3rd generation) units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding), tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2021 using pre-production ³ÉÈ˰æ91ÊÓÆµ 13 mini, ³ÉÈ˰æ91ÊÓÆµ 13, ³ÉÈ˰æ91ÊÓÆµ 13 Pro and ³ÉÈ˰æ91ÊÓÆµ 13 Pro Max units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding), tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August and September 2020 using pre-production ³ÉÈ˰æ91ÊÓÆµ 12 mini, ³ÉÈ˰æ91ÊÓÆµ 12, ³ÉÈ˰æ91ÊÓÆµ 12 Pro and ³ÉÈ˰æ91ÊÓÆµ 12 Pro Max units and software, subscribed to LTE and 5G carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin February 2020 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (2nd generation) units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2019 using pre-production ³ÉÈ˰æ91ÊÓÆµ 11, ³ÉÈ˰æ91ÊÓÆµ 11 Pro and ³ÉÈ˰æ91ÊÓÆµ 11 Pro Max units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2018 using pre-production ³ÉÈ˰æ91ÊÓÆµ XS, ³ÉÈ˰æ91ÊÓÆµ XS Max and ³ÉÈ˰æ91ÊÓÆµ XR units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2017 using pre-production ³ÉÈ˰æ91ÊÓÆµ 8, ³ÉÈ˰æ91ÊÓÆµ 8 Plus and ³ÉÈ˰æ91ÊÓÆµ X units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ 7 and ³ÉÈ˰æ91ÊÓÆµ 7 Plus units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin March 2016 using pre-production ³ÉÈ˰æ91ÊÓÆµ SE (1st generation) units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2015 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6s and ³ÉÈ˰æ91ÊÓÆµ 6s Plus units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

Testing conducted by ³ÉÈ˰æ91ÊÓÆµin August 2014 using pre-production ³ÉÈ˰æ91ÊÓÆµ 6 and ³ÉÈ˰æ91ÊÓÆµ 6 Plus units and software, on both GSM and CDMA carrier networks. The playlist consisted of 358 unique audio tracks purchased from the iTunes Store (256-Kbps AAC encoding). All settings were default except: Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.