How to Reset the MMS Settings of Sony Xperia Z

To reset the MMS settings of Sony Xperia Z is just the same with resetting the internet settings.

1. Go to Apps by tapping on the square icon with multiple squares
2. Tap on Settings
3. Tap on More
4. Tap on Mobile Networks
5. Tap on Access Point Names
6. Tap on menu
7. Tap on Reset to default

All of the internet and MMS settings that you have should now be removed.