The Phone Goes Dead 2.0

  Linda James is walking in Hyde Park in London when she notices that the weather has changed from a beautiful day to a sky filled with darkess, tipical weather for London. They say there are two things you're not supposed to do in a thunderstorm: first take shelter under a tree, second is make a phone call She does both these things. As rain is pouring down on her, she takes shelter under a huge tree, then puts in a number.
  She says "Steve" "I'm in Hyde Park."
  Thats all she got to say. Suddenly, a blinding white flash of light as thousands of volts of electricty enter her body. She dies.
Noone knew much about what happed, they didn't know who Steve was or why she was in Hyde Park.  After her body was removed, the coroner discovered that her phone was broken but the SIM card still worked. So they put it back on the market.
  A few weeks later, a father named Mark Adams goes to buy a phone for his son David Adams. The phone a Zodiac 555, a cheap, clunky, and dated phone not exactly one of those nicer high end phones. The only reason David wanted a phone was he thought it was cool just to have one.
  David was sixteen, now spending more time away from his his house in Ventnor, a small island on the Isle of Wight.
  At about 4:30 pm David gets a phone call from an unknown number, he picks the phone up.
  "Hello?' It's an old man.
  "Yes?' David is sure it's the wrong number.
  "I need you to do something for me, do what you are said" The old man says.
  "I want you to go to see my wife at Number Seventeen, Primrose Hill. Tell her that her wedding ring is under the fridge, She'll understand." The old man said. 
  So David does as he said, he rings the bell. A woman named Mrs. Sanders answers the door.
  " Eric said, that the wedding ring is under the fridge." David says.
  The woman suddenly burst into tears.