Green 3G light blinking but service works

[Miami61]

My microcell service did not work over the weekend and had a green blinking 3G green indicator.  I powered down all of my devices several times and still no solid green light or Mocrocell service on my iPhone 4.  When I woke up this morning the 3G indicator was still blinking BUT now my iPhone 4 does, in fact, display the M-cell tag on the screen.  Is "blinking" the new "solid"?  My friend who also has a microcell tower and lives in a different state and has a different ISP has the same issue.  I chatted with ATT and they said they would open a case to their engineers.  Does anybody have any insight?

[Otto Pylot ACE - Professor]

The blinking green 3G light usually means that an update has been sent to the MicroCell. AT&T usually does this overnight without warning. The MicroCell is supposed to reset itself properly and  you never know the difference. The fact that it is blinking green and not red, and you still have phone service, is good. The blinking green 3G should mean that you have lost service to the AT&T servers or your registration has failed. If your service is still good then I'd keep an eye on it but it should resolve itself once AT&T has fixed whatever the issue is on their end. FWIW, a blinking red 3G indicates a hardware failure or the inability for the MicroCell to properly reset itself after an update and it thinks it's broken.