My wife updated to PR1.3 OTA about a week ago and ever since, she says her phone has been acting up. Going slower instead of faster, always having problems connecting to 3G, and fMMS I know I need to set that up again.

My question is, if I reinstall PR1.3 using Nokia Software Updater, will it erase everything on her phone such as pictures and music? And will she need to reinstall all her programs and all?