Internet and MMS Not Working on OS4 After Jailbreak

[scotboy15]

My iPhone froze yesterday and wouldn’t get past the apple logo on restarting it so I had to put it into DFU mode and restore and update it to OS4. I have since jailbroken using jailbreakme successfully but since then my internet (over 3G) and MMS isn’t working.

I’ve tried looking around to see if anyone else has had the problem and found this thread [ame=http://forums.macrumors.com/showpost.php?p=10298203&postcount=41]Mac Forums - View Single Post - MMS and Cellular Data not working at all[/ame] But notice this thread is probably out of date. Has anyone else seen this problem and know if the guide in the link will solve it?

[customlowz]

When I upgraded to the 4.0 software I had the same issue. I found out that if you restore from a backup (contacts/apps/ect...) you will get the issues. Restore the phone again, Jailbreak, and then DO NOT SELECT RESTORE FROM BACKUP... Set up as a new phone.

[korin125]

With every update you should set up as a new device. That's what syncing is for.