[Unregistered]

While I am texting my Samsung Galaxy S4 will glitch and it will either type out random letters I did not touch or it will call the contact. It happens very often it sometimes calls while I am unaware. Please help.

[B. Diddy]

Welcome to Android Central! Does it only happen when texting? How about when using the keyboard while entering text elsewhere, like in Facebook? Do you have any other problems with inaccurate touches? If so, it may be a screen/digitizer problem.

Try booting the phone into Recovery and wiping the cache partition, which can sometimes help various problems. You won't lose any personal data: Reset: Samsung Galaxy S 4 | T-Mobile Support