How do you use your cellphone when you are in the bush. What are your expectations, how much do you rely on it ????  The article noted below may be an interesting read for you

https://www.washingtonpost.com/national/health-science/why-its-a-real-mistake-to-count-on-a-cellphone-when-you-go-hiking/2017/09/15/7bc1a822-6595-11e7-8eb5-cbccc2e7bfbf_story.html?hpid=hp_hp-more-top-stories-2_hiking-918am%3Ahomepage%2Fstory&utm_term=.4dce51b58c88