The Lumia 810 I use as a daily driver had a bad USB port - thanks eBay. Got that one fixed and used it for about 8 months. During the last week while in rural India, the phone dropped off the charging cord (about 6 ft high) don't ask and the USB port crapped out. I had to shut the phone down immediately because new rules require the phone to be charged before boarding a flight to the USA. Long story short, no charge on Monday morning of this week. Finally got the port fixed again (lucky to have spare ports on hand) but currently waiting for new micro SIM card to test it out. Will post back soon to see if all is well with the phone or not. There is a very good chance of damaging the microphone near the USB port rendering the phone useless for calls. Hope that is not the case as I really like my 810.