The FAA's relaxed regulations will include the use of wifi and short-range Bluetooth accessories. However, a ban on making mobile phone calls still applies.
The authority said it had based its decision on information provided by airlines, aviation manufacturers, passengers, pilots, flight attendants, and the mobile technology industry.
While implementation of the relaxed regulations may vary from airline to airline, the FAA said it expected most carriers to allow passengers to use their devices during take-off and landing by the end of the year.
It is likely to bring into effect a recommendation that all airlines assess their fleet to ensure they can withstand radio interference from personal electronic devices.
This will be submitted to the FAA to be verified, before they will be permitted to allow passengers to turn on their devices.
"We believe today's decision honours both our commitment to safety and consumer's increasing desire to use their electronic devices during all phases of their flights," said US Transportation Secretary Anthony Foxx.
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