T-Zones not Woring on one phone but works on another?

[jluzbet]

Hi All,
I have had t zones for 1 year no problem on my i phone, all the sudden today it does not work, I have done a million reboot, taken the Sim out called t mobile and nothing. took the same put it in my wife's i phone and it works there...
Any idea?

[sactownstar]

Which apn are you using? If you're not already using it, try putting in epc.tmobile.com