Iphone 5 please read

This is a black iphone 5 Itpurchased on merc battery was not holding a charge. Was a tracphone. Was told is unlocked phone showed up i was able to charge but would sometimes not hold or pass 10 percent sometimes it would work fine. I only played a with it on wifi. Purchased the battery & install kit. I Plan to put in Or you can. There is a brand new case blue green. Willing to negotiate the cost. Let me know if your interested. Cross posted will ship prompt. Screen euc.