I'm a heavy smartphone user. I read emails, access Twitter, check in on Swarm/Foursquare, watch YouTube, and look at weather forecast, multiple times a day. I use smartphones so much that my primary phone, the Nexus 5, needs to be charged 2~3 times per day, and I am reluctant to stay in places without free WiFi.
But, everything is changing in the past weekend: I joined a camping trip to Grand Canyon National Park. There is no electricity. There is no cellular signal, because national parks do not want cell towers to ruin the beautiful landscape. There is no WiFi, except in the cafeteria which we may or may not visit. Without electricity, I cannot keep my smartphones charged. Without cellular or WiFi, I cannot receive emails, access Twitter, check in on Swarm/Foursquare, watch YouTube, or use weather forecast apps. How can I survive the weekend in the national park, without electricity or Internet access?
Internet access is unavailable, but it's not the only way to communication with the outside world. On many smartphones, there's a forgotten app called the FM radio, which allows you to receive information without Internet access or cellular signal. Therefore, I packed an old smartphone, the T-Mobile Comet, which has an FM radio tuner. This would allow me to listen to the weather forecast, and maybe some news and music.
My camping trip is a short one: we depart on Friday and return on Sunday. The lack of electricity can be solved by a few USB PowerBanks. I brought two USB PowerBanks, which contain a total of 12800mAh of electricity, enough to charge the Nexus 5 five times, or the T-Mobile Comet ten times.