ONLY FONE / Model ZERØ

ZERØ

Calls. Texts. Life back.

An 80 mm square flip phone with twelve keys, one control and a screen like paper. Nothing to scroll. Nothing to check.

The phone works. Tap its keys and the ring, drag to turn it. Keyboard: arrows, Enter, 0 to 9.

Controls

Twelve keys. One control.

No answer button and no end button. The ring moves through the list; the centre does what the screen says: answer, end, select, send.

Centre
Answer, end call, select
Ring
Up and down to move, left to go back
1
Space while texting
* #
Delete and symbols, kept for dialling

Closed

Close it to hang up.

Shut, it is a plain black square with the name on top. No outer screen, no camera. The USB-C port sits in the front edge, so it charges closed.

80 × 80 × 18 mm closed / R8 corners / 110 g budget

Display

A screen like paper.

2.7-inch monochrome e-paper. It redraws only the part that changed, so it stays still, readable in daylight and easy on the battery. A timed front light is an option for the dark.

264 × 176 px / 57.29 × 38.19 mm active / 0.3 to 0.42 s partial refresh

Twelve screens.
That is the whole phone.

Calls, texts, contacts, an alarm and the battery. Pick a screen to load it on the model above.

Specification

Proposed baseline from manufacturer brief Z0-MFG-002, revision 0.4.

Body
80 × 80 × 18 mm closedSquare clamshell, outer corners about R8
Weight
110 g design budgetGoal range 95 to 120 g
Display
2.7-inch monochrome e-paper264 × 176, optional timed front light
Network
4G VoLTE calls and SMSOne nano-SIM under the rear cover
Battery
1,500 mAh, 3.7 V / 5.55 WhProtected 1S Li-ion polymer
Battery life
7 to 14 days light use4 to 6 hours continuous calling
Charging
USB-C, 5 V, 400 mA4 to 5 hours from empty
Controls
12 keys, one 5-way controlSide volume, Hall sensor on the hinge
Does
Calls, texts, contacts, time, alarm500+ contacts, long and Unicode SMS
Does not
No apps, camera, Android or outer screenNo MMS, RCS or WhatsApp
Finish
Matte black, white Helvetica legendsOne colour, one keymat
Price target
£79 launch / £99 regularIncluding UK VAT, subject to quotes

All dimensions, weights, battery and charging figures are engineering targets. No hardware has been built or measured yet.

Where ZERØ is now

October 2026. The design is locked enough to quote. The next step is a working electronics demonstrator.

Concept render of the ZERØ phone, one open showing the keypad and screen, one closed showing the ONLY FONE ZERØ wordmark
Concept render of the simplified-controls design. Not a photograph of hardware.

Blueprint

Manufacturer brief v0.4Nine sheets: envelope, packaging, electrical, battery, firmware and release gates.
Done

Print model

Appearance prototypeBase and lid as STL and STEP, 2 mm pin hinge, 60 × 41 mm screen insert. Hinge clearance checked at 15, 45, 90, 150 and 165 degrees.
Files ready

Demonstrator

Working phoneQuote request prepared for a T107-class 4G board driving the e-paper panel. Not yet commissioned.
Next

  1. G1Board drives e-paper
  2. G2VoLTE and SMS on UK networks
  3. G37-day battery profile
  4. G450,000 hinge cycles, 1 m drops
  5. G5USB-C and pack tests
  6. G6RF, EMC and safety approval