We excitedly bought the Oystr phone for my teenager in late July, activated it, charged it, etc. It never held a charge for more than 36 hours. We tried a charger from her sister's Kyocera (different model) phone. Still no charge. Returned it to Target, and exchanged battery for another Oystr battery. Still no charge. Finally returned Oystr phone with replacement battery to Target and exchanged for another Oystr phone. Again, tried to charge 3 times using the 3 Kyocera chargers we now own. THIS PHONE WON'T HOLD A CHARGE MORE THAN 24 HOURS!!! I got on the internet and found that LOTS of people are experiencing the same thing with the Oystr phone. It's obviously NOT the battery, NOT the charger...IT'S THE PHONE!