I have a samsung infuse that i bought used in good shape,im using my sim card out of my e71 from straight talk and have been for a while with no issues in a samsung captivate.in the infuse i have tried multiple apn settings but am still getting 120kbps download speeds with H+ connection.i know until i order a sim from st for 4g i will be slower than it could be but not that slow.please help because its worthless right now,20 minutes to watch a 2 min video or forever to download apps.