Wonder if somebody might have an answer to this and possibly try it out on their s2 for me to see if the same happens.
When I have tethered for a while, if I reboot the phone afterwards, my battery drops by around 30% just on the reboot. For example, if I have 44% left after tethering and then reboot by pressing and holding the power button until the phone reboots, by the time it's finished booting (which isn't long) it has dropped to 14% and it tells me to plug the charger in. If I don't plug the charger in (this is a real mystery this bit), every few minutes, the battery will keep increasing by 1%. This is without really using the phone much that it does this. It will keep regaining that 1% every few mins until I reboot the phone again and it remains at whatever it's got up to during that time.
I'm ringing Samsung tomorrow as I am pretty sure this isn't normal behaviour. However, I would like to ask if somebody might be kind enough to tether for about half an hour or so with their s2, then reboot (using power button and holding it til phone auto reboots) and tell me if you also lose more power. And then of course, see if it starts to creep up again.
I know that's quite a big ask and would only advise somebody with truly unlimited data to try it as tethering consumes a lot.
Bear in mind that tethering also drains battery anyway so make sure you have at least 60% prior to trying this just in case you lose the power too.
Hope I'm making sense here.
Thank you in advance
Ps, if there is a logical explanation for this, that would be good but I'm assuming something is amiss.