Call Interferes with iPhone Video recording?

[Don Blauvelt]

If your recoding 4k video on an iPhone Xs Max and a cellular call rings in will it interfere with the video recording?

[fdisilvestro]

Yes, you should put the phone in Airplane mode and turn off all notifications when filming / photographing. If using a high bit rate capable app such as Filmic pro, then it is also recommended to exit all other apps and flush the memory

[Christopher Sanderson]

Yes, you should put the phone in Airplane mode and turn off all notifications when filming / photographing....

Agreed, a live iPhone that is polling a nearby cell tower will also cause interference on audio recordings made with some radio mics on certain frequencies. I make it a rule to have all phones turned off while recording.
Chris