Har själv inte råkat ut för detta men enligt Mobiserv Solutions ska detta vara en lösning
1) Go to WiFi Settings,
2) Find your Connection of your WiFi name
3) Press the Arrow on the right
4) Select Forget Network
5) Scan the network again
6) Connect to your WiFi again
7) try SimFree.app and it will work
8) also try without sim card in the phone <-- this is important if
you have the bad IMEI (0049901000000040000)
9) Try another WiFi access point