Xiaomi Watch Series

Xiaomi Watch S3 and S4 eSIM Edition have cellular hardware — the standard S3 and S4 models do not. The two versions are nearly identical in appearance; the distinction is only in the model name and packaging. Because these watches are China-market products, verify LTE band compatibility in your destination country before use.

Key Takeaways

• Xiaomi Watch S3 eSIM Edition, S4 eSIM Edition: cellular supported.
• Standard Xiaomi Watch S3 and S4: Bluetooth only, no eSIM.
• China-market device — check LTE band compatibility abroad.
• Activation via Mi Fitness app on paired smartphone.

Does the Xiaomi Watch Support eSIM?

Only the eSIM Edition variants of the S3 and S4. Standard models are Bluetooth-only. The eSIM Edition label appears on the original box and device spec sheet — the watches themselves look identical externally. Confirm in the Mi Fitness app: if an 'eSIM' section appears under your watch settings, you have the cellular model.

Xiaomi Watch Models and eSIM Compatibility

How to Activate eSIM on Xiaomi Watch

Setting up an eSIM on your Xiaomi Watch is performed through your smartphone:

1. Open the Mi Fitness app on your paired phone.
2. Go to the Devices tab and select your watch.
3. Tap eSIM.
4. Tap Set up mobile plan.
5. Select Scan QR code.
6. Scan the Roamix QR code received via email.
7. Follow the on-screen instructions to finalize the installation.
8. Once complete, your watch will connect to cellular networks independently.

Troubleshooting Xiaomi Watch eSIM

'eSIM' option missing in Mi Fitness app: You have the standard Xiaomi Watch S3 or S4 (Bluetooth-only) rather than the eSIM Edition. The eSIM option only appears in the Mi Fitness app for eSIM Edition hardware. Standard models cannot use eSIM — this is a hardware limitation.

QR scan fails during activation: Phone must have stable Wi-Fi and watch must be in Bluetooth range. If scanning from an email attachment, ensure the QR code image is uncompressed. Use manual activation code entry as an alternative within the Mi Fitness eSIM setup.

No cellular signal after eSIM installation: Confirm the Roamix profile is set as the active plan in the Mi Fitness app → your watch → eSIM → Manage plans. If the profile shows as installed but not active, select it and set it as the default.

Limited or no signal internationally: Xiaomi Watch S3/S4 eSIM Edition is a China-market device — the supported LTE bands may not match frequencies used in your destination country. Check Xiaomi's spec sheet for supported bands and compare against local carrier frequencies.