Hello Abiquiughost,
I understand how frustrating the software glitches being experienced are to you. I would like to confirm the software version on your phone. An update has not been released for a while but just want to be sure your phone has the latest. Press Menu>Settings and Tools>Phone Info>SW/HW Version. Which symbols are being displayed differently? Does it seem as if a certain process cause these issues, for example, only while texting or after making calls? Please let me know if I can troubleshoot this issue further.