[Q] Unlocked One S on Straight Talk - stuck at 2g speed
I have a straight talk AT&T micro-sim that I was using in my wife's AT&T iPhone 4 (unlocked but shouldn't matter) which was configured with the att.mvno APN. 3G data and MMS worked wonderfully. Now I have taken the same SIM and put it into a T-Mobile HTC One S and I cannot get 3g, let alone 4g, data to work. MMS is functioning and 2g data works. I have unlocked the bootloader via the HTC Dev method, rooted the stock ROM, and I have SIM unlocked the phone using ascot17's method on this site (http://forum.xda-developers.com/show....php?t=1693491
). I have tried the att.mvno APN setting (works, but only 2g data) and the newer tfdata APN setting, which gets me NO connection at all. The funny thing is, when I reboot the phone, it shows 4G data for about a minute, and if I run the speedtest app, it gets 4-6mb down speed which is about right for 4g in my area (Janesville, WI). After about a minute, it switches to 2g. I have also contacted HTC (no help, they say it's a network issue) and Straight Talk (no help, they walk me through APN changes and then claim I need to contact the manufacturer). Has anyone had any luck getting the One S to use 3g or 4g on Straight Talk? Would I be better served to get a T-Mobile SIM? Is it worth trying to flash a custom ROM instead of my rooted stock or is that a waste of time?
Thanks in advance for any assistance!