3G Microcell U-verse Dropped Calls After 30 Seconds
I recently switched over from DSL to U-verse. Several months prior to that I had purchased a 3G Microcell and had little to no issues with it. After the switch though, I have had nothing but problems.
The current issue is that about 30 seconds into the call, the person on the other end is no longer able to hear the voice of the person connected through the 3G Microcell. Then usually about 1 minute into the call, it drops out. If End Call is pressed, the iPhone connected to the microcell freezes for several seconds before returning to the home screen. After this, the 3G bottom light on the microcell will often begin blinking as the connection to the AT&T servers appears to reset.
Initially I had 10% packet loss, but was able to resolve this with U-verse. They scheduled a technician visit, and had the problem fixed before he even arrived. I now have 0% packet loss and either an A or B rating with pingtest.net.
I also attempted to manually configure my router settings by changing the MTU to 1492 and setting up Port Forwarding for UDP 123, 500, 4500 and TCP 443 to the microcell in the Pace 5031NV router settings. This had no effect, so I have since taken the further step of placing the microcell in the router's DMZ.
Since I occassionally would receive a 102 error message (the registered address does not match the actual device location) when attempting to deactivate and re-register the microcell, I verified with AT&T that the GPS coordinates being sent by the microcell matched my address, which they did.
I also took my iPhone 5 to the AT&T store to swap the SIM card. This had no effect either. Neither did disabling LTE on the phone or disabling hand-out on the microcell.
After many calls to tech support, AT&T finally sent me another 3G Microcell to try. Unfortunately, this did not resolve the problem either.
At this point, I am considering trying out Charter internet or giving up on microcell entirely and trying Magic Jack. At least with cable service, I would have the option in that case of bypassing the router for the microcell by connecting directly to the modem.
When I last spoke with AT&T microcell group they recommended I speak with U-verse or even Cisco for further troubleshooting as they blame the problem on the internet connection. However, when I called U-verse, they were unable to help and transferred me back to Mobility for the microcell...
Running out of ideas. Appreciate any thoughts or suggestions...