Sentence 1: My sister-in-law called me yesterday. 
 Sentence 3: I could not tell her how to do it, as she had an old slide phone 
 Sentence 4:  I had to go to youtube to get lessons 
 Sentence 5:  I called her today but her daughter had fixed the problem 
 Option 1: She wanted to change the wallpaper on her phone. 
 Option 2: She wanted to change the wallpaper in her house.