How to Update Your DSLR Firmware (i.e. Nikon D3400) - YouTube
New Nikon D3400 and D5600 firmware upgrades improve Snapbridge connectivity - Nikon Rumors
Nikon D3400 Review
Amazon.com : Nikon D3400 DSLR Camera with AF-P DX NIKKOR 18-55mm f/3.5-5.6G VR and AF-P DX NIKKOR 70-300mm f/4.5-6.3G ED : Electronics
Nikon D3400 vs. Canon EOS Rebel T6 | PCMag
Nikon D3400 Firmware Update C 1.11 | Photography Blog
Nikon Firmware Updates (28/02/2017) for D3400 (Ver.1.11) and D5600 (Ver.1.01) Cameras: Connections Between Cameras and the iOS 10.2 Version of the SnapBridge App – Photoxels