Same thing happens to me. But I did notice when my 4g signal is strong I stay on 4g whole time. I hit 4g today and hit only 13mbps. Reason I say only is because a tmobile phone here on hsdpa+ gets usually 8-12mbps on regular basis. Lte for tmobile started popping up here too and on average it doesn't go below 22mbps. I hope Sprint steps it up. They have till December to get their act together.
Sent from the Great Galaxy Note 2 using Tapatalk 2
I personally never see them beating others in LTE speed. I do know when they started they even said they aren't going to be the fastest.
Sent from my Sprint HTC One using AC forums.