Just make sure that you have followed instructions exactly. Make sure you flash whatever kernel is listed with flashtools after flashing the ROM.
Been rooted/custom stock ROM since day 1 with my t-mobile C6606 and haven't experienced any problems.
Best bet is to start from scratch by flashing a complete generic 4.2 ROM with flashtool, root/recover, and then upgrade to pre-rooted ROM.
Sure you are aware, but you will lose the t-mobile specific functions (wifi calling), but also the bloat if you move to a custom stock ROM like eXistenZ.
Do you have a suggested generic 4.2 ROM in mind or just look for an unbranded 6603 4.2 ROM .ftf and flash with flashtool? Then root, install XZR and follow directions for what ever desired stock based ROM such as .101, correct?
And Im assuming, do not flash the baseband for the 6603 or other non 6606 device, correct?
This one should be good to go » http://xdaforums.com/xperia-z/general/stock-rom-xperia-z-c6603-10-3-1-2-67-t2512422
Flashtool instructions (follow just as it says, baseband and all) - http://xdaforums.com/xperia-z/general/tutorial-how-to-flash-stock-roms-t2240614
Root » http://xdaforums.com/xperia-z/development/root-how-to-rooting-firmware-10-3-1-0-t2386405
Recovery » http://xdaforums.com/showthread.php?t=2261606
Update to .569 » http://xdaforums.com/xperia-z/development/stock-update-to-10-4-b-0-569-t2565850
Update to .101 » http://xdaforums.com/xperia-z/development/stock-update-to-10-4-1-b-0-101-t2643898
Flash custom stock ROM of your choice. There may be an easier way than this, but this is the route I have taken and all has worked well.
T-mobile APN's for 3G/4G/LTE. I input these every time I clean flash. I confirmed these settings with a friends moto x that is completely stock » http://xdaforums.com/showthread.php?t=2236735 4G will actually show as H+ by the signal bars.
If you run into any problems let me know and I'll try to help. Just take your time and follow all instructions. It's well worth it rather than waiting on t-mobile to push our updates, especially now that KK has been officially announced for Q2 (hopefully May). T-mobile will probably be another 2-3 months behind that.
Thanks it's completed now I got it! Wicked cool features on this.. Now I'm going to read around and get to know all this a little better now that I got this working. :good:.
Never mind! Used the UK unbranded and I love it! everything worked nicely! thanks so much for this!
Hey man yeah everything seems to be perfect except for the MMS aspect of my messages. I can't seem to download the MMS messages, the default texting app keeps telling me that "Could not download message. Check settings for multimedia messages and try again later" I tried the APN settings to the forum you directed us too but that's not working =(
Do you have a suggested generic 4.2 ROM in mind or just look for an unbranded 6603 4.2 ROM .ftf and flash with flashtool? Then root, install XZR and follow directions for what ever desired stock based ROM such as .101, correct?
And Im assuming, do not flash the baseband for the 6603 or other non 6606 device, correct?