Advice Please...I have a jailbroken/unlocked iphone 4 running on 4.01 and 1.59.00. Everything works just fine EXCEPT I can not change my APN so that I can use data. I have tried the APN changers from Unlockit.nz and benm.at but either I am doing it wrong (high degree of probablilty!) or it just doens't work for me.

Can I upgrade to 4.1 and get the ability to set my APN manually, or is there some other combination that will restore the ability to set the APN?

Thanks,