I just had to use my extended warranty from t-mobile (Asurion is the company I made the claim with) last week. I received a brand new T-999L to replace my T999. I'm loving the speed of the LTE and did root using odin to the stock rom. I'm not too keen on going further though after reading how all the roms on here don't fully support the t99L, reading how they might work or require patching but may not work at LTE speeds is reason enough to just keep the phone as is for now.
Current: White Nexus 5 on T-Mo, iPhone 5 on Verizon, and a cracked(display) but taped up Toshiba Thrive
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Previous: Black mytouch 4g
You never forget your first: White mytouch 3g 1.2
t-mobile customer for 12 years....
OH GOD WHY