Sentence 1: Jack had a smartphone and was also very generous. 
 Sentence 3: The message said to make a donation by texting a number 
 Sentence 4:  Jack made a $10 donation, but on his bill $500 was charged 
 Sentence 5:  Jack decided to make sure not to donate without research 
 Option 1: One day, Jack received a message from his regular, trusted charity on his phone. 
 Option 2: One day, Jack received a message on his phone.