I bought a refurbished Evo 4g a little over a month ago along with sprints $7/month warranty (the sprint store was selling them to people with a new contract or if your 2 years were up). Last night I dropped the phone and the whole screen cracked..so now I have to deal with their insurance company and pay a $100 deductible. I suppose my question is: If I buy a digitizer screen and replace it myself (only $23) , does that void any kind of warranty that anyone here knows of? It's past 30 days of purchase and it's refurbished..since it was taken apart by the manufacturer can they even tell if I open up my phone? Will my sprint extended warranty (the $7/month one) still be valid? Thanks for any replies!