How to prove to my sister I didn't take the phone?

Thanks guys, I’ve tried everything to try and convince her. it was actually her 12 year old son mates. and I went out that night.. they think I threw it away or gave it away I look guilty as hell but I know I didnt do it. thanks for the advice though I shall write an email using some of your tips any other tips would be great

if she’s been through your room and everything, and she didn’t find it, why is she still not believing you?!!! I mean… where could you hide it if it’s not in your room! and through it all, you didn’t even steal it!! ummm… you can ask her, “why are you forcing me to tell you something I didn’t do?!” and tell her, “did I ever force you to admit something you didn’t do?!!!” and if she doesn’t believe you you say, “if you still don’t believe me after all I did to prove that I didn’t steal anything from you, then GET HELP!!! cause I know myself more than you do, and I know what I did, and you don’t, I ADMIT that I DIDN’T steal it!”

Just stop her and say; ‘’Look here I didn’t steal your phone and It hurts me that you think I did! Your my sister and I love you, I wouldn’t steal from your or your family. Believe me if you want but I’m only telling you the truth.’’ If she doesn’t believe you then she doesn’t there’s really nothing you can do… Just tell her and see what she says!!

Maybe you should try and help her get a new phone…That might prove you didn’t take it!