|This article is about a/an device in Kamen Rider Fourze.|
The NS MagPhone (NSマグフォン, Enu Esu Magufon) has two functions. It can be split into N Magnet Switch and S Magnet Switch, and inserted it into the Fourze Driver to access Magnet States. When inserted in the Driver, they are used as joysticks to control the Magnet Cannon Modules. When both parts are attached, it can be used as a phone.
It's also an important part of the two Magnet Switches, because without it, Fourze can't access Magnet States and only access the Magnet Modules, which are uncontrollable. So far only the MagPhone serves as a second "henshin" device for Gentaro to achieve a new state.
Gentaro had asked rookie Kamen Rider Club member Ryusei to lighten Kengo's load at the Rabbit Hatch by helping out with the adjustment of the Magnet Astro Switches. Ryusei mistakenly declares the switches ready-for-use, much to Kengo's protest. Tachibana discovers the error in the process and secretly provides Ryusei with the schematics for a controller device, which will suppress the magnet switches to the degree of being usable. Kengo is jealous that Gentaro would entrust his work to a rookie. Ryusei goes ahead and builds the NS Magphone and again declares it ready. However, the device won't work (it won't divide in two), much to Ryusei and the club's shocked then Kengo was still upset that Magphone wasn't finished yet. When Ryusei confronts Kengo to fix things with Gentaro (using magnets as a metaphor), Kengo realizes what adjustments have to be made with the phone. Once successful, Fourze was able to achieve Magnet States.
- The different forms the MagPhone take are referred to on the toy box is (once again, in English letters) the combined "Mobile Phone Mode" and the separated "Switch Mode".