I have the s3 from at&t. Mods, customizations Anker 7200 mah battery Rooted CyanogenMod (kit kat 4.4.2) Over clocked 1600 MHz With the mods I have. I feel like it has revived the gs3 for me. It never lags, or dies. You can pick up the ex battery for 50 bucks on amazon. It literally took me 10 minutes to root, backup and install the ROM. The best part? I didn't even need a computer to install my rom like most websites suggested. I did to root though. If anyone needs any help let me know. What kinds of mods do you guys have?