Android gateway

The phone that holds your SIM.

The gateway is an Android phone running LineFerry. It answers the real call on your SIM, relays it to your iPhone, and keeps itself running.

Check my phone Installation guide

Gateway · Galaxy S10+

Online

SIM 1: LTE
Relay target: iPhone · Wi-Fi
Wake-up: APNs VoIP
Supervisor: Healthy

Event log

14:02:11.204Incoming call+1 555 014 2368
14:02:11.231VoIP push → iPhone200 OK · 0.39 s
14:02:11.802iPhone ringingCallKit
14:02:14.517Answered on iPhoneaudio up

What it does

A small exchange in your pocket or on your shelf.

Relays every call

Incoming calls ring on your iPhone; outgoing calls you dial on the iPhone are placed from your SIM.

Sends and receives texts

SMS to your number reach the iPhone; replies are sent from the gateway, from your number.

Wakes your iPhone

When LineFerry is closed, the gateway sends an Apple VoIP push so the call still rings.

Syncs call history

The gateway's call log appears in the iPhone's Calls tab, with favourites and missed-call badges.

Looks after itself

A supervisor restarts the relay within seconds after a crash, and starts it again after a reboot.

Rings itself as a fallback

If no iPhone can be reached, calls ring on the gateway's own screen instead of going silent.

Requirements

What the gateway phone needs.

Remote access over the internet is in development; today both phones need to share a network.

Root access: Rooted with Magisk. Root lets the gateway answer and place calls on the SIM.
A supported model: Certified today: Samsung Galaxy S10+ (Exynos). More models are being tested.
Your SIM: Any carrier. Calls and texts are billed on your plan as normal.
Power and a network: Kept charged, on the same Wi-Fi as your iPhone or sharing its hotspot.

Under the hood

Three parts, installed once.

1
LineFerry module
A Magisk module that runs the relay, its bundled runtime and the supervisor. Starts on boot.
2
Gateway app
Becomes the phone's default dialer, so the gateway can answer and place calls on your SIM.
3
One settings file
Ports, logging and fallback ringing live in a single configuration file.

Will my phone work?

Search your model. Only certified phones have been tested end to end.

Samsung Galaxy S10+Exynos, SM-G975F
Certified
Tested end to end. Rooted with Magisk, runs the LineFerry gateway today. Join the waitlist with this phone
Samsung Galaxy S10 / S10eExynos, SM-G973F / SM-G970F
Likely works
Same hardware family as a certified phone. Expected to work; not yet tested. Join the waitlist with this phone
Google Pixel 6 or newer
Planned
Next on our test bench. Join the waitlist with this phone
Samsung Other Galaxy models
Not tested yet
Not tested. Tell us on the waitlist: requests decide what we certify next. Join the waitlist with this phone
Xiaomi Xiaomi, Redmi, POCO
Not tested yet
Not tested. Tell us on the waitlist: requests decide what we certify next. Join the waitlist with this phone
Tecno, Infinix, itel
Not tested yet
Not tested. Tell us on the waitlist: requests decide what we certify next. Join the waitlist with this phone
OnePlus OnePlus
Not tested yet
Not tested. Tell us on the waitlist: requests decide what we certify next. Join the waitlist with this phone
Motorola Motorola
Not tested yet
Not tested. Tell us on the waitlist: requests decide what we certify next. Join the waitlist with this phone
Another Android phone
Not tested yet
Not tested. Tell us on the waitlist: requests decide what we certify next. Join the waitlist with this phone

Frequently asked questions

Can I still use the gateway phone for other things?

It's best kept as a dedicated gateway: LineFerry becomes its default dialer and its calls are relayed to your iPhone. When no iPhone is reachable it rings calls itself.

Does it need to stay plugged in?

We recommend it. The gateway is always listening for calls and keeps a network connection open, so it's happiest on a charger.

What happens after a reboot or a crash?

The relay starts on boot and a supervisor restarts it within seconds after a crash. It won't restart in the middle of a call.

Request early access

Join the waitlist Setup guide