1. Explore Alternatives: 1. Be ignorant to the fact that their phone is broken and pretend you don't know what happened to it. 2. Own up to your mistake and tell them you did it. 3. Put the blame on someone else.
1.1. 2. Consider The Consequences: 1) Someone else takes the blame even though they didn't do it, and the phone owner will be mad at them. In this case, they may not be mad at you, but you might feel really guilty. 2) They'll be angry you broke it and may not lend you things anymore. 3) They may find out you did it and get mad at you. 4) They don't care and just buy a new one. (Very unlikely)
1.1.1. Identify Your Values: I think honesty is very important, and personally will not get mad at anyone for telling me the truth. So, I think I would tell them the truth, hoping that they would forgive me for making a mistake.
1.1.1.1. Decide And Act: I decide to tell the person that I broke their phone. I walk up to them, feeling remorseful and sorry, and admit that I did it. The person took it well and didn't get mad at me, but I'm pretty sure they won't trust me with more of their expensive and valuable stuff.
1.1.1.1.1. Evaluate The Results: This wasn't one of the worst results, but it could have been better (that wasn't in my hands). I did the best that I could, and now I won't feel guilty for not taking the blame or giving the blame to someone else.