This guide applies to T1 Pro, L1s, L1m.

1. What Is 4G Service?

4G keeps your bike connected to the internet, so you can use remote features in the TARRAN App—even beyond Bluetooth range.

Check your bike’s location and battery level, lock it remotely, or receive security alerts while you are away.

Is 4G required for riding?

No. Riding, motor assistance, brakes, gears, and Bluetooth features work without an active 4G subscription.

2. Available Features with 4G Service

Remote features require an active 4G subscription and cellular coverage.

Make sure you have bound your bike to the TARRAN app.

Refer to your model’s Quick Start Guide to bind your bike.

2.1 Remote Control and Security

-Remote Locking and Unlocking

If you have added a phone key, you can lock or unlock your bike remotely from TARRAN app.

See Tutorial for detailed instructions.

-Remote Lights and Horn

Activate your bike’s lights and horn to help locate it nearby.

-Bike Location

Check your bike’s location in the App.

Directly view bike's location.

Use the map to navigate to your bike's location.

-Lost Mode

Enable or disable Lost Mode remotely. When enabled, the bike reports its GPS location once per minute.

Your bike will be fully locked and cannot be unlocked until you disable Lost Mode in the app.

-Sentry Mode Activation

Tap the Sentry button on the homepage of the app.

-Sentry Alerts

Receive push notifications when Sentry Mode triggers an alarm.

Lock screen

Messages in the TARRAN App

Profile page in the TARRAN App

Homescreen page in the TARRAN App

-Sentry Album

View and download Sentry Mode recordings remotely.

2.2 Sync and Backup

-Ride Backup

Tap Trips in the TARRAN App to see your ride records if you have toggled the Cloud Backup on in your display.

-Bike Status

Check battery level, 4G cellular signal, and other bike information remotely.

-Owner and Bike Details

Changes to owner or bike details in the App sync to your bike.

3. Get Started with 4G Service

Your bike includes 12 months of free 4G service from activation. Renewal is optional.

For additional service granted by TARRAN Support, refer to your support confirmation.

Step 1: Bind Your Bike and Check

Use TARRAN App 1.5.0 or later.

Refer to your model’s Quick Start Guide to bind your bike.

Open TARRAN app，and tap Settings to check:

Activated At: Bike activation date.

4G Expired At: Service expiry date.

If your subscription is active, no further activation is needed. If it has expired, see Renewal below.

Step 2: Check the Connection

Make sure:

Your bike is bound to your TARRAN account.

Your phone is connected to the internet.

Your bike has power and cellular coverage.

Check the cellular signal icon on the bike’s display, or in the App.

Step 3: Try a Remote Feature

For example, you can follow https://tarranbikes.com/pages/video-tutorial?model=9332113015030&sub=Safety%26Anti-theft to check if you can track the bike's location.

4. 4G Subscription Renewal

-Renew Your Subscription

You can renew your 4G subscription through TARRAN app.

For instructions, see the Tutorial

Active subscription: The new subscription starts when your current one expires.
Expired subscription: The new subscription starts immediately after purchase, provided renewal is still available.

Subscriptions are linked to individual bikes. Each bike requires its own 4G subscription.

-Expiry Reminders

Reminders are sent 7 days before expiry and on the expiry date through in-app messages and push notifications.

Reminders are also sent to your account’s linked email address or phone number. If both are linked, email takes priority.

-After Expiry

4G features become unavailable, and bike status information in the App stops updating. The App will prompt you to renew when you access affected features.

If your service has been inactive for too long, renewal may no longer be available in the App. Contact TARRAN Support or an authorized dealer for assistance.

4G Service Introduction and Guide