After updating my iPhone software to OS 4.0 the other day, I found my 3G network had stopped working. Each time I tried to access data, I got a blue pop up screen saying “Could not activate cellular data network” and “You are not subscribed to a cellular data service”
Somehow the update had messed up my network settings, but I managed to find a solution. If you’re also on O2 and having the same problem, the following steps should fix it.
- Click on Settings
- Choose General > Network > Cellular Data Network
- Here you will need to change the APN for “Cellular Data”, “Visual Voicemail” and “MMS” to mobile.o2.co.uk
- If you’re a pay as you go customer, type in payandgo.o2.co.uk
- Restart your iPhone by pressing the Home and Sleep button simultaneously for the changes to take place.
Let me know how you get on with this. If it doesn’t work for you, try resetting the network in Settings by going to General >Reset and clicking on “Reset Network Settings”.
Thanks!
Worked perfectly.
Your solution was the only one that told me what to do – as I have pay-as-you-go.
Thank heavens I didn’t reset…
Cheers!
Brilliant advice. Problem solved. Thank you!
Thank you so much you’re a star!