Nikon D3400 DSLR Camera | Interchangeable Lens DSLR Camera with SnapBridge Connectivity
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
Download Firmware 1.01 and 1.11 for Nikon's D5600 and D3400 Digital Cameras
How To Update Nikon Firmware (D3400) // Jasdeep Dhindsa - YouTube
How to Update Your DSLR Firmware (i.e. Nikon D3400) - YouTube
New Nikon D3400 and D5600 firmware upgrades improve Snapbridge connectivity - Nikon Rumors