Low Power Mode on iPhones can affect video streaming resolution on 5G networks, but the behavior varies depending on the iPhone model. On iPhone 12 and iPhone 13 models, enabling Low Power Mode typically disables 5G, except when video streaming or performing large downloads, where 5G remains active[1][3][8]. For these exceptions, 5G is used because it's more efficient than 4G or LTE for those tasks[3].
However, the iPhone 14 series and newer models do not disable 5G when Low Power Mode is active due to the improved efficiency of Apple's 5G modems and power management systems[3].
Keep in mind that Low Power Mode also impacts other settings. For example, on iPhone 13 Pro and later models, the ProMotion display's refresh rate is limited to 60 Hz, which may affect the viewing experience[1][3][5]. Low Power Mode also disables features like Perspective Zoom and may affect background app refresh and other performance aspects[3][5]. Video quality is also impacted by packet loss rates, which can vary based on compression parameters and resolutions[2]. Higher video quality settings consume more energy and network traffic[4].
Citations:
[1] https://support.apple.com/en-us/101604
[2] https://www.mdpi.com/1424-8220/23/5/2744
[3] https://ios.gadgethacks.com/how-to/is-what-happens-your-iphone-every-time-you-turn-low-power-mode-0184648/
[4] https://s2-group.github.io/2022-01-05-green-lab-experiment/
[5] https://www.reddit.com/r/iphone/comments/vlpfcv/a_full_breakdown_of_what_low_power_mode_actually/
[6] https://discussions.apple.com/thread/255725209
[7] https://www.youtube.com/watch?v=WCwyMaGd984
[8] https://support.apple.com/en-bh/101604