MPX 200 AT&T in COLOMBIA....NETWORK DENIED , help me

[Guest MAQ-PRO2]

Hello,

greetings from Colombia.

I have a MPX 200 (AT&T Wireless), working in Colombia in a 1900MHz operator.

Yesterday i was talking, when suddenly, the call finished.

The phone turn on a message "Network denied, searching", and today, i can't use again my cell

-I did clean the SIM Card, and test in my another phone, and it work ok, but when returned to my MPX200, don't work

- I can't call to my provider because this cell was "buy" in USA whit AT&T, and I am in Colombia, and using it in OLA a Colombian operator. then the technical support guys don't give information about the model wich don't "sell" OLA

-this morning i go to Setting-Telephony-Networks and then Menu-Select a network again. then the phone look as found a network, because show in screen the MCC-MNC 732103

And apper "Downloadin settings from network" .... OK

after "Sending information to network!",,, wait 2 or 3 minutes and appear the Warning "ERROR: Unable to save settings. Verify you have network coverage and that the settings is supported by your carrier"

what it mean????, because i had used the phone from 15 days ago.

What happen?

somebody can help me?

PD: Yesterday i did a Master Reset, but.. nothing the cell don't work.