OK...upgraded from an HTC Trophy to a Nokia Lumia 928 in August 2013...since then the Lumia has 'frozen up'...'locked up' THREE times. First two occurances, the pressing low volume and start buttons together for "soft re-set" worked fine -
however----latest incident (Wed. Nov. 6), "soft re-set" unsuccessful, phone shows "invalid SIM card" and calls coming in and going out are inoperable...PLUS phone only works for a few minutes AFTER connecting to charger...BUT email, internet WILL work (albeit only a few minutes)...ANSWERS???? IDEAS????
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