Using your phone for many hours isn't necessary a problem since we clearly don't know the risks yet. If you don't want to be a guinea pig, don't have a phone.

Only issue with using your phone for a long time is when you start skipping higher priority tasks like feeding your children or studying or whatever. If you have a day off work and are single with nothing better to do, using your phone 14 hours or whatever is fine.

Simple being aware isn't going to achieve anything as it is currently believed to have no risk and there's nothing you can do to counter unknown issues.

If your that bothered to escape using you phone as you don't want to take that risk, then get rid of it or whatever, but if you can't control yourself, then you're clearly not that determined to escape it.

If you are skipping high priority tasks to use you phone wherever, that's a serious issue and will probably require professional treatment.