Lightbulb Network issue! Full bars all time....low signal

Hi,


Having some strange problem with my HTC ONE X+ (AT&T), with signal reception and cellular network bars.... Bars shows 100% network even if there is signal a drop/low signal....

Even with all the bars (100%) signal, some time it shows out of network if someone dial to the number.

Even the network signal bars are constant at full and no dropping / changing, even if there is full signal or low.. but with no signal is doesn't show any bars.....

Even the 2G GPRS data reception is very low....

what could be the reasons and solution..

Arup
System Administrator at MBPL