Cell phones - old and new- are safe, including those that will use new 5G technology, so says the Federal Communications Commission.

FCC chairman Ajit Pai circulated a proposal Thursday that would keep the agency's current safety limits for radiofrequency exposure the same as it has been for 23 years.

Following more than six years of public input and review, the agency said that the current exposure levels for cell phones, wireless towers, Wi-Fi routers and all other devices emitting RF signals are safe.

There have been concerns and questions about the safety of mobile devices for years.

In 2011, the World Health Organization said cellphones might cause some brain cancers, leaving open the possibility that a link exists between cancer and cellphone radiation.

But most studies haven't found a link between radio frequency signals from cellphones or cell towers and disease.