Note: If you have a myTouch 3G / 3G Slide/ 4G, see: Verify the Access Point Name (APN) and internet data connection - T-Mobile myTouch 3G / myTouch 3G Slide / myTouch 4G
When you receive errors trying to send picture messages (MMS) or access data or the internet, confirm your Android phone is set up correctly. This is usually a problem with device settings.
Check settings and reset APN
Checking mobile network settings and resetting the APN resolves the majority of issues, and is much faster than verifying all settings.
Note: This varies on different software versions.
Verify and update APN settings
ONLY if the above steps did not resolve the issue, then verify the APN settings:
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