Here's the rearranged version:

1. We talked on the phone for more than an hour yesterday.
2. In the near future, mobile phones will run on solar energy.
3. Telepathy devices will become popular in 30 years.
4. If we use our phones too much, we become dependent on them.
5. Many teenagers prefer chatting on the internet to meeting their friends in person.
6. Jack is video conferencing with his colleagues in Asia at the moment.
7. They had a discussion about natural disasters at 9 a.m yesterday.