crollsurf wrote:I don't trust my phone.
A wise attitude.
I don't trust compasses either. I've seen compasses that become remagnetized and point the opposite way. I've seen compasses with sticking needles. I've seen demagnetized needles that just spin round and round. I've seen people trying to use northern hemisphere compasses in the southern hemisphere, or equatorial compasses in temperate zones. I've had the inner capsule pop out of my compass somewhere along my walk, making the compass useless when I needed it. I've seen compasses that have lost their fluid, making the needle stick. And, of course, a local magnetic anomaly (e.g. due to rock with a high iron content) can make a compass needle deviate from magnetic north.
So, as you say, always pay attention to your surroundings. Know how to get back to safety without any navigation assistance - this could involve retracing your steps, or pre-planning how to reach an area you know well, or knowing the "safety bearing" that will get you back to an unambiguous linear feature (such as a road) from anywhere in your vicinity.
For me, phone apps have now reached the point where they surpass the utility and reliability of a compass, but I still assume that the app (or the phone) could fail at any moment.