I too just bought the jbl power up and can confirm it does not work with the nexus 4. It tries to charge the device, but it will not charge with the speaker. It appears that it is charging but wait 5 or 10 seconds and the lights start flashing fast to denote the device is not properly positioned. I've tried to reposition it in every single possible way but cannot get it to charge, even upside down. The speaker sounds excellent however I cannot get the NFC to work either. At first I thought it was working but the Bluetooth just pairs fast and I think that is all that makes it connect since it will connect from far away.