Posted in PV2+ but thought I would try here also. I have a PV2+ V3. I have the new 2.1 ESC. The 3.08 firmware. When trying to take off Phantom will just spin real fast but never lift off. I have tried several batteries that all check good, recalibrated IMU, set remote to mode 2 where left stick is throttle up. Have the DJI 9450 Props. not the knock offs. I get green lights flashing for take off. I have had a FC40 before this one so I know how to, calibrate do compass ect. I was not connected to vision app but did not think I had to just to take off and fly. I did NOT have range extender on as I just wanted to take off and fly with no video so don't know if I need to do that? I did not upgrade firmware after putting on the 2.1 ESCs but I already had the 3.08 firmware and keep hearing bad things as people move up to 3.12. I bought this used with a bad motor and just change out all the 2.0 ESCs to 2.1 at the same time I put on a new motor. So I never saw it fly before I bought it. All things seem to work Its just that it won't take off, just spins fast but no lift.