1. Go to Settings > General > Profile

• If you have a Profile set, select it and delete it. You may be required to enter your password
• If you don't have a profile set, you can simply proceed to the next step

2. Go to Cellular Data Network by following the instruction that applies to your iOS:

• Tap Settings > Cellular > Cellular Data Network OR
• Tap Settings > General > Network > Cellular Data Network

3. Enter the following values in all applicable fields. (Do not change any of the other fields):

• APN: simple
• MMSC: http://smpl.mms.msg.eng.t-mobile.com/mms/wapenc

4. Tap Home or Cellular to save

5. Re-boot your device