Hello all, I recently bought an unlocked version of an AT&T GS3 SGH-I747. I am planning on using straight talk for this device on the "t-mobile network". Will I be able to access the T-Mobile 4G/LTE or will I have some stunted version of the network? SGH-I747 runs on 2100 hz band...same as T-Mobile's new network so I'm hooping so. Thank you for any input.