Which phone do I have?!

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http://forum.xda-developers.com – So I Traded someone a blackberry for this Lg esteem 4g i believe. 2.2.2 Firmware. it says Tmobile on the front of the phone it says google on the back like how it says on nexus phones My Rogers sim works. calling BUT not the data. When the phone starts the animations are of fido. model number: LG-P990HN Is the phone unlocked? if so why isint data working? what is the name of the phone specifically so i can find the proper root things. does anyone know if i can get atleast gingerbread on it? Thanks! (HowTos)