Technically mohammedessam is correct that "It looks like" you can only do it every 90 days because that's what the system tells you ;)
But the truth is less restrictive than how it looks.
Buy low, sell high.
There's an important announcement tomorrow...
They have never lied nor inferred that they were doing full builds. It has always been the GMO from the beginning. Care to explain legacy GPRS sites that are now broadcasting EDGE while awaiting...
I really hope T-Mobile is planning to upgrade all of their backhaul. I'm seeing a lot of lte with only 2g speeds across the US. (I know because I'm a truck driver, I'm everywhere lol)
And T-Mobile has HD Voice (AMR-WB) over its UMTS (W-CDMA) network and their LTE network.
It is a fact that the call quality on T-Mobile is technically superior to any other carrier in this country.