***AI DERIVED ANSWER
You can absolutely pull this off without carrying two handsets.
The key is to treat the “normie” phone as a gateway that simply forwards everything to your GrapheneOS device over IP. Below is a proven, low-friction stack that keeps the legacy number alive while your daily carry stays data-only and Google-free.
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1. Forward calls at carrier level
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Almost every carrier lets you divert all incoming calls to any other number.
On the normie phone, open the stock dialer and type:
```
**21*DESTINATION_NUMBER# 〈call〉
```
(where DESTINATION_NUMBER is a VoIP number you control, not the Graphene device itself—see next step).
To undo: `##21#`.
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2. Give the carrier something to ring
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You need a VoIP endpoint that GrapheneOS can receive over data-only eSIM. Two privacy-respecting options:
- **Jmp.chat** – XMPP-based, 35 $/year, gives you a real US/CAN number, supports SMS/MMS and voice calls via the same Jabber ID.
- **Voip.ms** – pay-as-you-go, 0.85 $/month per number, SMS via SIP MESSAGE or their REST API, calls over SIP.
Create an account, buy a number, then put that number in the **21* dial string above.
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3. Receive everything on GrapheneOS
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- **Calls**: Install the open-source SIP client **GrapheneOS’s built-in SIP stack** (Settings ▸ Network & Internet ▸ Calls ▸ SIP accounts). Enter your VoIP credentials; calls now ring over data.
- **SMS**: Jmp.chat and Voip.ms both expose SMS as XMPP or email. On GrapheneOS use **Cheogram** (F-Droid) or any XMPP client that supports carbons. Messages arrive instantly, end-to-end encrypted if you enable OMEMO.
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4. Optional: forward texts from normie phone when Wi-Fi is alive
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If you want to keep the normie phone on Wi-Fi and still harvest texts in real time:
- Install **SMS Forwarder** (F-Droid, no Google) on the normie phone.
- Set it to forward to your VoIP number’s email-to-SMS gateway (Jmp.chat gives you `yournumber@cheogram.com`).
- Disable on-device notifications so the normie phone stays silent.
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5. GrapheneOS eSIM gotchas
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- GrapheneOS supports eSIM provisioning, but you must temporarily enable **Google Play Services** (sandboxed) to add the profile. After activation, disable Play Services again; the eSIM stays working.
- Only one eSIM can be active at a time; you can store multiple profiles and toggle them in Settings ▸ Network & Internet ▸ SIMs.
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TL;DR
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1. Carrier-level call forward to a VoIP number.
2. Use Jmp.chat or Voip.ms for that number.
3. Receive calls/SMS on GrapheneOS via SIP/XMPP over data-only eSIM.
4. Optionally mirror legacy SMS with an open-source forwarder.
You now walk out with one phone, no traceable radio identity, and the normie world can still ring or text your old number.
***AI DERIVED ANSWER***
