Phone not confirmed yet
Will KeyAgain run on the Sony Ericsson W810i?
Probably, but not confirmed yet. The Walkman phone with the orange music keys. It runs Sony Ericsson’s Java platform, shared with the Cyber-shot line we’ve seen running KeyAgain.
At a glance
- KeyAgain
- Not confirmed yet
- Brand
- Sony Ericsson
- Released
- 2006
- System
- Sony Ericsson Java Platform
- Java
- MIDP 2.0
- Keyboard
- Number keypad
- Mobile network
- 2G (GSM/GPRS/EDGE)
- Wi-Fi
- No
It runs the Java platform KeyAgain is built for, but nobody has confirmed this exact model yet.
What works on the Sony Ericsson W810i
- Telegram chats, through Telegram’s official API
- WhatsApp and WhatsApp Business chats (beta, unofficial linked-device bridge)
- Photos and voice notes, built into the app (the option shows on phones with a camera and microphone)
- An optional AI assistant for quick questions (paid add-on)
Why it should work, and what we don’t know yet
The Sony Ericsson W810i runs MIDP 2.0, the same Java system as phones we’ve already seen running KeyAgain in the Sony Ericsson family. Firmware, screen size and the operator’s network still vary, so we only call a model confirmed once someone has used it. The first 3 days are free: install it and tell us how it went at hello@keyagain.app.
How to install KeyAgain on the Sony Ericsson W810i
- Open your account at my.keyagain.app on a computer or modern phone, and connect Telegram and/or WhatsApp.
- On the Sony Ericsson W810i, open the browser and go to m.keyagain.app to download the app (about 156 KB). No browser? Download the file on a computer and send it by Bluetooth or cable.
- Open KeyAgain on the phone. It shows a 6-digit code: type it into your account once. Your chats arrive on the phone.
Tip for the Sony Ericsson W810i: It’s 2G-only, so check that 2G still runs where you live before you start.
Networks: will it get online where you live?
The Sony Ericsson W810i only has 2G, so it needs a 2G network or nothing. 2G is already off in the United States and Switzerland and is ending in France during 2026, while the UK, Germany, Spain and others keep it for a few more years. Check your country →
Good to know before you start
The phone needs its own internet connection: mobile data on the SIM, or Wi-Fi on models that have it. WhatsApp arrives through an unofficial linked-device bridge that WhatsApp doesn’t endorse, and your main phone must come online at least every 14 days. Messages pass through our server to reach the phone, so this is not end-to-end encryption; the server keeps at most the latest 30 messages of each chat, encrypted, for up to 7 days. Security on an old phone: what KeyAgain does, and what it can’t →
More about Sony Ericsson phones →
Questions
Does the official WhatsApp app still work on the Sony Ericsson W810i?
No. WhatsApp ended its apps for Nokia Series 40, Symbian, BlackBerry OS and other classic systems in 2017–2018. KeyAgain is a different route: WhatsApp stays on your smartphone and the Sony Ericsson W810i receives your chats as a linked device, through an unofficial bridge (beta).
Do I still need a smartphone?
For WhatsApp, yes: it stays your main device and must come online at least every 14 days. For Telegram, no.
How much does it cost?
Basic costs €4.99, £4.49 or US$4.99 a month, with 3 free days to try it. The AI assistant is an optional add-on. WhatsApp is experimental and free while it lasts.
