This can happen on XP3plus & XP5plus. You may see a toast message “License Failed” for a few seconds on the display when you want to type a text message or add a contact or enter some other text. In this case you cannot change the input method and only numbers are allowed. To resolve this issue, open SETTINGS–>APPS & NOTIFICATIONS–>SHOW SYSTEM APPS. Find “12key Keyboard”, Force Stop the app, then open Storage & cache and Clear Storage. NOTE: This procedure will delete all words saved in the Personal Dictionary.