iphone 5 currently on 3g network will it work as well in 4gLTE

As the title suggests, I am in a country where no 4g is available yet, so im using it on a 3g network (Im in Taiwan by the way). I am going on a business trip and hope to use the 4g lte network there (through prepaid sim card). I have searched for the models that support 4g lte (like A1428-29). Mine is MD300TA. I have searched this model num and I couldnt find it except in Taiwan web. Anybody how has the similar model number and have used it in 4g networks? THe phone is unlocked.

Message was edited by: umi40