mobile

I have recently purchase a Note 4 clone phone from China. It works very well but I have a problem. When I got it I inserted an EE micro simcard which work fine whilst I waited for my proper talktalk simcard to arrive. Now however when I insert the talktalk simcard in I get no signal and the message emergency calls only.

I think with these types of the devices, once you insert the first sim card into it, they tend to lock onto that network and won't work with anyone other.

My question is therefore:-

• Is there a way to unlock a Note 4 clone phone


• If the phone can not be unlocked, I was thinking that if I back up the ROM and reflash the phone with the same ROM it might fix the problem. But I do not know how to back up the ROM. I've read a number of threads but still remain confused.

Any help would be greatly appreciated as I can not use the phone at all now. The device is rooted.

Thanks in advance