Text settings to 2020 if that does not work
Then enter the settings you need manually.
Go to - Settings (More) - Wireless & Networks
Mobile Networks - Access Point Names -
Tap the MENU key - select 'New APN'
Type in this info:
Name - giffgaff
APN - giffgaff.com
Username - giffgaff
Password - password
Tap the Menu key then press 'Save'.
Click the circle next to it to see a green light.
Your internet should now be sorted.
There are 3 ways to set up your MMS and internet settings for your phone
1. Text “settings” to 2020
2.Connect to WiFi and download and install an app on your phone called “tweakker”
This will put the correct APN settings in for you
3 You can set up your android phone manually as follows
Settings > Wireless & networks > Mobile Networks > Access Point Names
Menu button - New APN
Enter the following
MMS proxy: 126.96.36.199
MMS port: 8080
Finally if all else fails then there is a manual guide to setting up your android, just follow this link