Is there anyway to avoid the data connection turn of by themself? When it get disconnected , it will not active back by itself.. unless i restart my phone or turn on airplane mode and turn off..

One more is, when i get in the room without network connection(no signal). it will disconnect, but when i came out from a room that have signal, not matter how long i wait, it will not search for the network and auto connect

I dun have such problem on my HTC.. is there a fix for this?

yes, im on DiGi.. but i dun have such problem on my HTC