If you wanna go dirt cheap and major basic Nokia Candybar phones for Pay as you go companys are the best bet. They are often designed and made for developing countries with little to no bells and whistles. I have one unactivated for 911 calls that I would bring with me when I consider it would be needed. Also look up videos on some of them the one I own I found a video of two kids throwing it in a sink of water while on and it lasted over a few minutes with no issues.