No Internet on Your Zeekr or BYD: When SIM Slot Soldering and eSIM Fix It
You get into your Zeekr or BYD, but the maps won't load, the music is silent, and the app on your phone says "vehicle offline"? Relax. In the vast majority of cases this is not a hardware failure and certainly not a "brick." The car is fine — its connectivity module simply can't see our network. Below we explain what you can safely try yourself right now, why the internet drops on Chinese EVs at all, and how we restore connectivity without any risk to the car.
First aid: what to try right now
Before driving anywhere, try a few safe steps — sometimes that's enough to bring the connection back:
- Reboot the head unit. Press and hold the screen's power button for about 10-15 seconds until the display goes dark and restarts. This does not reset your settings.
- Check the network settings. Make sure airplane mode is off and mobile data is enabled.
- Let the car "sleep." Close and lock it, then leave it for 20-30 minutes. The low-voltage controllers will go to sleep and restart the connectivity session — a gentle equivalent of a 12V power-cycle that needs no wiring work.
- Change location. Drive a few hundred metres: sometimes the cause is trivial — no carrier signal in that exact spot (an underground car park, an enclosed courtyard).
If after these steps the maps, services and app are still dead, the issue is almost certainly the SIM/modem tied to the Chinese network. That's where our work begins.
Why it happens
Chinese-market Zeekr (001, 007, 7X, X, 009) and BYD (Song, Tang, Han, Leopard 3/8, YangWang U8 on the DiLink platform) arrive with a built-in connectivity profile for a Chinese carrier. Outside China that channel simply doesn't work: no data, no cloud. And because navigation, the voice assistant and the app all talk to Chinese servers, they fall silent too — maps don't update and your phone sees the car as offline.
It's important to understand: the modem hardware itself is fine. The problem is the software binding to a foreign region and network. Our job is to legally adapt the software to our region and give the car a working connection via a local SIM or eSIM.
What not to do
- Don't flash "dumps" or firmware from unknown chats. It's the fastest way to turn your head unit into a genuine brick.
- Don't open the unit and solder it yourself without the experience and tools — delicate ribbon cables run right next to it and are easy to damage.
- Don't do a full factory reset hoping to "fix connectivity" — it often only makes things worse and wipes some of your settings.
- Don't trust promises to "unlock it" remotely with dubious software. Stable connectivity is a properly configured channel, not a one-off trick.
How we restore connectivity
We work carefully and transparently. First comes the VIN and an inspection; diagnostics take about 15 minutes. Then we make a full backup of the current state so we can safely roll back if needed. We never touch critical ECUs (brakes, battery, steering, driver-assistance).
When soldering is actually needed, and when it isn't:
| Situation | Solution | Soldering |
|---|---|---|
| An accessible slot or eSIM support exists | eSIM/APN setup for our network | Not needed |
| The SIM is soldered to the board, no slot | Installing a physical SIM slot | Soldering required |
| Profile is bound but the channel is available | Software localization + activation | Usually no soldering |
In other words, we only solder when there's no other way to connect our SIM. Often an eSIM or the right configuration is enough. After that we localize the interface and maps if needed. All work is done at our Kyiv workshop (21 Prykoliyna St., daily 09:00-21:00), usually within 1-2 hours.
If an official OTA update ever overwrites our localization, we'll re-apply it free of charge within 6 months.
How much it costs
We quote the price right after the VIN and inspection — with no hidden fees.
- Basic localization: Zeekr from $300, BYD from $350.
- Connectivity package (LANG+CONNECT): from $500 — localization together with a stable internet setup via SIM/eSIM.
- Auto-concierge (we pick the car up and return it ready): from $100.
The exact amount depends on the model and the condition of your specific car, so you'll hear the final figure before any work starts.
FAQ
Is this "hacking" the car? No. We legally adapt (localize) the software to our region and configure a working connectivity channel. We don't touch critical systems.
Will it all disappear after an update? An official OTA can overwrite the localization. That's exactly why there's a guarantee: we re-apply the work free of charge for 6 months.
How long does it take? Diagnostics take about 15 minutes; the work itself usually 1-2 hours.
Is soldering mandatory? No. Soldering is only needed when the factory SIM can't be connected any other way. Often an eSIM or configuration is enough.
What about the car's warranty? We make a backup, keep a safe rollback path and don't interfere with critical ECUs.
If the internet on your Zeekr or BYD is dead, message us on Telegram, WhatsApp or Viber: +38 (063) 010-12-34. We'll quote the price right after the VIN and inspection. For the full list of work specific to your model, see our ZEEKR localization page.