Ohh...your sister so smart.
she borrow the phone to ppl who are first time meet thn the ppl was take her iphone leave without mention,thn why she dont follow him when he was leave?
Is it she dont care about her phone anymore?Ohh...if like that she better donate her iphone to the poor family without the communications tools,thn i think all ppl will clap and give a thumb to u.

So be carefull for the ppl and dont juz simply give or borrow your phone or other important private things to the other who you r dont know or 1st time meet.But use the thousand somethings or abt 2 thousand to buy the lesson is unworthy.