I am facing a tethering problem which I cannot explain why. I have 4 phones, A1, A2, B and C. A1 and A2 are exactly the same make and model. A1, A2 and B cannot tether but C can. Cannot tether means a second device (tablet or iPad) can login to t...
I found where the problem is. In deed it is a system software bug! These phones have two SIM card slots. If the second slot is left empty, tethering won't work. If the second slot is occupied, even by an expired SIM, tethering works fine. My ove...
One point I wish to add is A1, A2 and B were purchased together with my friend's overseas phone, so they are (in theory) the same version and even the same production batch. In fact, I even compared the software version with him and found they were ...
In most phones, airplane mode is shutting down ALL wireless signals. That includes wireless, wifi and bluetooth. Maybe the odd phones would leave the wifi running and only shut down the wireless signal. If you want to avoid accidental roaming charg...
Another way to save on battery power is whenever data is not needed (e.g. at home or office using wifi or you don't have a data plan), set the prefered network to 2G instead of 3G or 4G LTE. This will not change your call quality and internet speed ...
