Feature phones have been having something of a quiet comeback, driven largely by people who are tired of the attention-capturing machinery baked into modern smartphones. Most of what’s on the market offers a stripped-back feature set with very little room to grow. Calls, texts, maybe a basic camera, and that’s about where the conversation ends, which hasn’t exactly made the category feel like an exciting place to be.
The Sidephone SP-01 has been quietly building a different kind of case for itself since its debut in 2025, not by piling features onto a simple phone but by letting users choose what kind of phone they want through a swappable modular keypad system. The Mini Controller Keypad is the fourth tile to join that family, and it’s the most unexpected one yet.
Designer:
Unlike the T9 pad used for texting or the Sundial’s iPod-wheel-style controls for music, the Mini Controller brings a game controller layout to the front of the phone. It carries a D-pad, A, X, Y, and B action buttons, plus Start and Select, all of which will feel immediately familiar to anyone who has ever held a handheld gaming device. The keypad sells separately for $29, the same price as the other add-on tiles.
To go with the hardware, Sidephone has developed two mini games that ship alongside the keypad: Mini Asteroids and Mini Blocks. They’re clearly starter content rather than the main event, but they establish that this isn’t just a novelty tile. The company has plans to open a community development environment so that third-party developers can build their own games and apps for the platform, which is when things will likely get more interesting.
What Sidephone has been sketching out goes considerably further. GBA and arcade emulator support has been floated as a longer-term possibility, alongside universal smart remote functionality. If even a portion of that lands, the Mini Controller starts looking like less of a playful add-on and more of a meaningful expansion of what a deliberately simple phone can do on an idle evening.
The whole system rests on the premise that a feature phone doesn’t have to be a featureless object. The SP-01 runs a custom Android-based OS, carries a 2.8-inch touchscreen and a 12 MP camera, and supports essential apps without dragging in the full weight of a smartphone’s notification ecosystem. The swappable keypad system, which uses pogo-pin connectors and magnets to click tiles into place, is what allows the device to shift personalities without requiring a hardware upgrade.
The Mini Controller sits alongside a growing family of tiles that now spans T9 dialing, compact QWERTY typing, scroll-wheel media control, and controller-style gaming. What started as a phone built around the premise of doing less has turned into a modular platform that keeps finding new things to do, each one contained in a $29 tile that snaps onto the same core hardware.
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