A mobile crossword

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Across
  1. 3. You can take pictures with this feature.
  2. 5. You write and receive texts with it.
  3. 7. If you want to talk to people you...
Down
  1. 1. It shows you the time.
  2. 2. You can post pictures and videos on it so other people can see them.
  3. 4. You use it to find your way arount the city.
  4. 6. You can fill in important dates in it.