I am brand new at this. I bought a Phantom 3 standard and began working my way the the DJI Videos. With tablet # 1, I was able to do a prop check and got video on my device. It said to do a firmware update so I did. I do not recall if I still had a signal after the update. I believe I was trying to move on to the IMU calibration. It seems that I powered off the P3 as instructed but I never got back to doing the IMU cal. Meanwhile, that tablet went TU. I tried to get a replacement but was unable to (long story). I bought a different tablet and I have been getting a 'No Signal'. However, this evening I was able to get a momentary connection 3-4 times (safe to fly) but nothing that lasts. I appear to be linked (light is green and props work). I have tried removing and reinstalling the Go App but that was not been successful. I know some others have had trouble with the last firmware update but I have not been able to revert to the earlier version using the means I have found on the web. Any ideas? Also, on the initial APP screen where you select CAMERA, that screen says I am connected to the aircraft. What exactly does the 'No Signal' mean, anyway?