After earlier having problems with the radar on the dji app i had some suggestions that the compass on my Galaxy S5 could be out of sinc especially as it is only two days old so i found a way to check and recalibrate the compass without the need for any compass checker app, this works for any of the Samsung Galaxys and i think any android phone. This is what you need to do. 1. On your phone dial on the telephone keypad *#0*# This brings up a "secret" service menu. 2.You will see a list of tiles, press the middle one named "sensors" 3.Now in real time you can see all the sensors on your phone, the compass is the circle at the bottom with a line through it pointing to north. 4.If the compass on the phone is calibrated correctly the line going through the circle should be coloured Blue with a little number 3 next to it. No need to go any further because your compass is properly calibrated so press back twice and you return to your homescreen. 5.If like mine you have a green line going through it and a little number two this means it is not properly calibrated on one axis, do as follows. 6. Move your phone in a horizontal figure of eight a few times, preferably outside not near any magnetic fields. 7.Now look at the line going through the circle and it should turn Blue with number 3 next to it, once done back out of the menus by pressing back twice. If the compass is seriously out then it will say next to the circle "compass needs calibration" You just need to do the figure of eight dance until the line turns blue with a 3. Everyone should check if the compass is true on their smartphone/tablet because the radar function is so important to flyers. My Galaxt S5 is only 2 days old so if your smartphone is fairly new maybe you should check. Like our phantoms the compass on our phones can also be disrupted by magnetic interference so should check it now and again. We got the "phantom compass dance" already, now we have the phone dance! Link from the net, they speak of the s5 mini but it is the same process for all android phones. http://www.solvemix.com/index.php/a...ini-how-to-calibrate-the-compass#.VAOaiGOzkeI This is something i learned today and never knew it before, i took it for granted that the compass on the phone was calibrated correctly but you check now and again in future.