WiFi calling is a great resource for T-Mobile subscribers, not only letting them save on plan minutes when completing their calls using a WiFi connection instead of a cellular signal, but also letting calls penetrate deep into buildings where cell reception could otherwise be spotty at best. That feature’s present on HTC’s latest Android for the carrier, its One S. Problem is, there’s apparently a power management bug tied to WiFi calls on the One S, and it’s threatening to drain users’ batteries.

The exact details of this problem haven’t been revealed, but a support page up on T-Mobile’s site informs us that the carrier has recognized that an issue does exist, and that it’s expecting to fix things with a future software update.

For the moment, there’s no ETA on when that fix might arrive, in the meantime, T-Mobile offers the ever-so-helpful advice to keep your One S plugged-in and charging while using WiFi calling. We suppose that will work, but seeing as this is supposed to be a wireless device and all, we’d love to see that fix get here sooner rather than later.

Have you noticed any sort of excessive power consumption when using your One S to make WiFi calls? If so, how much of impact are you seeing it have on battery life?

Source: T-Mobile