The T-Mobile HTC One S smartphone had just been released recently and it’s more than lived up to it’s billing of being a solid buy. While it’s no doubt a good device out of the box, there is the noticeable issue of significant battery drain while using the WiFi calling feature. Apparently, the battery seems to drain faster while being on a WiFi-based call— which points out to a software issue somewhere. To that end, HTC and T-Mobile have acted quickly to ensure this isn’t a continuing problem and are currently working on a minor software patch which is aimed to improve the battery life of the device when making WiFi calls. No word on when exactly this patch will hit the devices but hey, we always welcome software updates which offer an improved experience for owners— so we won’t mind the wait.
Source: T-Mobile Support