I have a Galaxy Note 4. I know that the Note 7 is restricted. Has anyone had trouble getting other phones aboard a plane recently?
Just want to know if I should leave it home.
This quite broad but let's review a few agencies.
India there's nothing aside from the specific Note 7 ban.
USA you might be surprised to see there's no mention of the Note 7 in the 2016 SAFOs. What there is the "SAFO 16011, Air Transport Restrictions for Recalled Lithium Batteries and Lithium Battery Powered Devices" -- the Note 7 got banned because it had a safety recall.
EU, this one is the only newer I am aware of, EASA SIB 2017-01 replaced EASA SIB 2016-14R1 on 2017 February 09 and instead of a specific device it focuses on "damaged, defective or recalled lithium batteries or devices" much as SAFO 16011 did.
In short: if your device is powered by a battery which is not damaged, defective or recalled you are good to go.