Change apn settings on iphone or android

http://wiki.apnchanger.org/Main_Page

Getting started
To change APN settings on iPhone or iPad, go from iPhone/iPad Safari browser to m.apnchanger.org
To change APN settings on Android smartphones, MiFi data modems or other mobile devices go to specific country and cellular provider. Install it manually on your device (devices can be found in "Mobile Devices APN guide" section below)
To see specific Cellular Carrier settings or prepaid data plans, choose country and operator