Just got a new razor phone as this was supposed to increase my signal. When indoors my phone has no service and no bars. If i walk outside, i seem to get full service, I can make a phone call, then walk inside and all around my house and have 3-4 bars with perfect calls. The second I hit "End Call", the service drops back to No Service with no bars.

To me, it seems like theres some sort of a signal booster for when the call is in place. But, the t-mobile techs say there is not. So, what could be causing this, and what could a remedy be?

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