Can anyone suggest a solution to iPhone 4 (ios 6.0.1) not finding an AT&T MicroCell signal?

Prior to upgrading to iOS 6, my iPhone 4 began to fail to acquire the signal from an AT&T MicroCell.  This solution to my reception problems had worked flawlessly for about 18 months.  We live in an area with poor reception which AT&T acknowledges, hence the MicroCell unit.
AT&T tested the cell and pronounced it hale and hearty.  All of the cell's external lights are clean and green.  After some days/weeks, I discovered that when the phone was rebooted, (turned off and back on) it would acquire and keep the micro cell signal for some time or until my routers were turned off, or I was away from the house/signal.  Then the process could be repeated and I would have signal again. 
ATT suggested I wait for the 6.0.1 iOS update before I upgraded, the implication being that all would be well.  Needless to say, all is not well.  Nothing has changed since the upgrade to iOS 6.0.1 and now the phone does not acquire the MicroCell, even after rebooting.
Does anyone have experience with this?  Thanks.

I had a similar problem and after dealing with a year of microcell issues, I switched to a signal booster instead.  I got one here.  It just wasn't worth dealing with a buggy device.  I'm not sure if it was my Internet connection or what, but I'm happy now.

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