[Q] Invalid MMI code????

Hi,

I tried the following codes on my phone:

*#06#
*#1111#
*#1234#
*#7465625#

and all I get is the message: "connection problem or invalid MMI code"

I do not think any codes works on my phone now....

Has anyone else come across this and can help?

This may have nothing to do with it but the Phone was unlocked using Voodoo sim unlock, and the original EFS files were backed up.