I own an HTC One XL running ViperXL 3.2.3 and Network Unlocked via Cellunlocker.Net. I had went to T-Mobile and purchased a micro SIM card activated with their $70 unlimited 4G plan. I went home put the SIM card in and entered my network unlock code and it worked on the first try. All though at first I my signal would go back and fourth from E, 4G, 4G+. After looking on forums for a couple hours I read that the HTC one x doesn't support tmobile aws bands. Anyway now to point I am now using my HTC one xl on tmobile with no less than 4g and 4g+ speeds. All it took was a tweak to my apn and bam 4g all day. If anyone needs help just reply to this thread. I included a photo of my network info. I included my speeds on tmobile 4g/4g+ In Tacoma,Washington.
Sent from my Blazing Fast HTC One X using xda premium
Sent from my Blazing Fast HTC One X using xda premium