This one mostly come from my favorite show Psych. The characters in this have problems with cell phones a lot. If you have ever seen this show you would agree with me.
Step 1: Do Not Intentionally Drop Others Phone
This one should be an easy step to follow but.... In this case a phone of a detectives' was dropped in peanut butter.
Step 2: Do Not Throw Phone at Bad Guy
I guess you could for protection but it might not help much.
Step 3: Do Not Drop Phone
Do not drop phone whenever you find out that you are in a closed museum with a killer mummy over the phone.
Step 4: Do Not Lose Phone
Do not lose phone under exercise machine you barely use while solving a case where a killer might come after you. It results in you thinking it is a bomb and there's a cup on the machine that says if your heart rate drops by 150 you die put by your girlfriend(the girlfriend didn't intentionally mean you would die. You get a lot of exercise.
Step 5: Keep Charged
Do not when in a museum have your partner try to crack the video surveillance communicating on phones when it is below 20%
In my opinion these steps are easy but for others probably not. If you have trouble following these steps buy a hard shell protective case.