Hi, I have a Samsung A70 (A705FN) that I received in the U.K. It is a global sim phone that is unlocked but for some reason it has a very poor/ inconsistent connection to my network (T-mobile) in U.S.A. It’s not the network or the sim. I’ve read online that apparently there are two models of Samsung A70: A705FN & A705M…and that the former seems to have issues in U.S. unless you ‘root’ it. Do you know anything about this? Would you be able to do this for me or be able to offer step-by-step instructions to me? Thanks.