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iphone constantly loses Cellular Data APN settings - PLEASE HELP

HI
I bought a 16gb 3gs iphone and contract from tesco just before Xmas. The settings I have used for APN and MMS are:
prepay.tesco-mobile.com / tescowap / password

Unfortunately the iPhone has an annoying habit of reverting to: idata.o2.co.uk / vertigo / password

Has this happening to anyone else how do I fix it??? This is the 2nd iPhone since the 17th Dec I have had that is doing the same thing.

;-(

mini mac using Airport, Mac OS X (10.5.1), 1.66GHz Intel Core Duo - 2 GB

Posted on Jan 10, 2010 1:30 PM

17 replies

Apr 17, 2010 10:01 AM in response to gandhimaster13

Since doing this (maybe just unlucky) I just discovered my entire data network has not been working. When awake my wifi was doing it but whenever my phone was asleep nothing was happening. Needed a reboot AND a sim card removal n clean coupled with reset network and getting rid of the unlockit profile for it to return to normal. AAAAARRRRRRGGGGGH! 😉

Apr 20, 2010 3:13 PM in response to gandhimaster13

update

i finally got off my arse and called apple today. their advise was this

its not an uncommon issue, but there are potentially many different causes for it. the thing to do initially is perform a restore (fresh, clean not from backup) and see how it goes, gradually installing new apps a few at a time. it is sometimes due to an app not functioning correctly and making its data connection unavailable to the other apps etc thus requiring reboots etc to clean it up.

im gonna try that but i have it all so nicely set up how i like it.... 😟

iphone constantly loses Cellular Data APN settings - PLEASE HELP