Microcell stopped working after working fine for over a year

Hi everyone, My Microcell stopped working after working fine for over a year
What happens now is that when it boots up all is green but the wireless network bars LED keeps flashing forever.
I know that as part of the normal boot process it first scans all 3G channels to pick the least conflicting ones before it initializes the internal 3G radio. Typically that takes good 10 minutes. However now it never finishes that scan and gets stuck there blinking green forever. Obviously nothing has changed on my side of things; I don't know whether something has changed in the neighborhood in terms of AT&T area controller or what not. Any help will be very much appreciated. Thak you!

Answer ALL the questions below as best you can and we'll try to help you.
MicroCell™ TroubleShooting Questions:
Have you read the Tech Guide first? 3G MicroCell Technical Guide by Otto Pylot
Do you have an active postpaid AT&T mobile account?
Is your MicroCell white or black?
Who is your ISP and is your service ADSL, cable, wireless or satellite?
What are your suscribed download and upload speeds as stated by your ISP?
Have you tested your internet speeds (http://www.speedtest.net/)? Please run the test and post your latency, download and upload speeds.
Have you tested your connection for VoIP quality (http://www.voipqualitytest.com/)? Please run the test and post the results that are listed under the "Advanced" tab.
Are you using the basic connection (modem -> router -> MicroCell) or the alternate connection (modem -> MicroCell -> router/computer)? The alternate connection is not possible with the black (DPH-154) MicroCell as it has no Ethernet output but it can be connected directly to the modem to temporarily test the Microcell without the network connected.
Are all of the cables firmly in place?
Do you have a combined modem/router (gateway) or a separate modem and router? What are the makes and model numbers for your equipment?
Have you met the minimum requirements for router settings as outlined in the Tech Guide?
What other equipment (access points, switches, computers, WiFi components, gaming consoles, etc.) do you have connected to your network?
What does the light pattern look like on the MicroCell (power, ethernet, GPS, and 3G)? Are they all a solid green or is any of them blinking green or red, and if so, which one?
Have you done a hard reset of the MicroCell? See the Tech Guide for instructions.
Have you deactivated and reactivated your Mcell using AT&T's MicroCell website?
Does the ac adapter feel warmer than the top of the MicroCell where the vents are?

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