I have giffgaff on my iphone but since downloading the latest Ios7 update I can't make or receive any calls. Help!

● Go to Settings
● Go to Mobile (or Cellular)
● Mobile Data (or Cellular Data)
● Under Mobile Data Network & MMS, enter the settings
● Which you can find here > http://giff.ly/gg_ios7

or here:

APN: giffgaff.com
Username: vertigo
Password: password

Visual Voicemail (just leave as is)

MMS

APN: giffgaff.com
Username: vertigo
Password: password
MMSC: http://mmsc-ac.mms.o2.co.uk:10021/mmsc
MMS Proxy: 193.113.200.195:8080
Max Message: 2097152
MMS UA Prof URL (just leave blank)

Switch airplane mode on and off That's it, your Internet and MMS should now be working