iPhone X GPS accuracy is off more than 40 feet

You need to check this in a wide open area without obstruction to a clear view of the sky. Your description sounds like multipath interference, where the GPS signals sometimes come direct from the satellite and sometimes by bouncing off nearby buildings and other structures. This can change from minute to minute as the satellites move overhead, and it changes the timing and distance the signal has to travel which completely messes up calculation of the GPS fix.

Edit: Adding... Please also consider that 40ft is close to the 10m minimum CEP radius I expect for an instantaneous fix (one fix snapshot) from non-differential GPS. On some occasions it may be significantly worse depending on satellite geometry and radio noise interference, and it can be improved for a static receiver by averaging over a period of time.

Mine is the same. You have to Reset All Settings not just the location based ones. It then works again for a month or so and I have to reset it all again. It’s very annoying. I have had every iPhone since iPhone 5 and the iPhone X is the first one this keeps happening to. It takes ages to set everything up how you want it again as well.

Check if Wifi is turned on (no need to have wifi connection), location accuracy should improve quite a bit

Same issue with me. I compared against my Suunto GPS Watch when running and it has 100-200m difference. Waze also got distracted when sometimes the position moved somewhere else.

I just switch from iPhone 6 and never had this kind of issue.

Can Apple release a software fix please?

Good day. I experience the very same issue, my stargazing apps are all out by metres. When using these apps on other model eg iphone6s it is spot-on accurate. Very irritating and lots of similar posts on the net with no resolution yet.

I have the same problem. Sometimes the iPhone is off by a few blocks. I have reset location and network settings and Nothing seems to help. This is absolutely annoying having a $1000 phone that doesn't work at all. I wish I could return this

Yes, I did that reset. It's pretty annoying. It doesn't work 100%. But at least I can drive with my iPhone as navigation. I've been an iPhone user since the original and this feels so Android that I have to compromise on something so important for no reason. I hope this gets fixed soon. Support just told me that I had to do that or restore. I cannot describe my frustration really.

Same thing here. I have a few stargazing apps and they all got the location / direction wrong. No issues with iphone6