Unlocked mobile phones would be costlier when compared with network locked mobile phones. So you can better buy a network locked HTC EVO 4G, unlock it and use it with T-Mobile SIM card. You can unlock a HTC EVO 4G safer and easier using unique unlock code. You can get the unique unlock code for a HTC EVO 4G from OnlineGSMUnlock.com at affordable cost with an easy unlocking guide. Good luck.