Samsung SGH-i600 problem with network registration/making calls

[Guest roam]

Hello,

I just had a friend buy me the Samsung SGH-i600 from Belgium. Great phone - but:

I have a SIM card from Fastlink Jordan.

I received my phone in Thailand and it worked fine (roaming)

Upon return to Jordan, the phone keeps saying No Service. I cannot place calls - but amazingly I can receive calls.

The phone is already pre-configured with the 4 Belgian Operators. There is no obvious way to enter a new operator - assuming this is the problem

I tried w other SIM cards from Fastlink - same problem

I really appreciate your help to solve this.

Best regards,

bman