Huawei Smartwatch Update Adds eSIM and Heart Rate Features

Key Takeaways

1. Huawei is rolling out a global update for the Watch Ultimate 2, featuring HarmonyOS 6.0.0.156.
2. The update allows users to make calls and send SMS via eSIM in power-saving mode.
3. Voice over LTE (VoLTE) is enabled by default for some eSIM carriers, but cannot be manually adjusted.
4. Users can now pair external devices like heart rate monitors and sensors with the smartwatch.
5. The update is approximately 1.01 GB and can be installed through the Huawei Health app or directly on the watch.

Huawei is now distributing a worldwide update for the Watch Ultimate 2. This smartwatch was officially introduced in several European nations in October 2025, showcasing multiple enhancements compared to its predecessor.

New Features and Improvements

Users in this region have reported the arrival of the HarmonyOS 6.0.0.156 software. The update, which is about 1.01 GB in size, allows users to make or receive calls through the watch’s eSIM while in power-saving mode. Furthermore, SMS messaging can also be done via eSIM with this battery-saving feature activated. Huawei has noted that Voice over LTE (VoLTE) is enabled by default for certain eSIM carriers, but it’s important to mention that VoLTE settings cannot be manually adjusted.

Enhanced Connectivity Options

Additionally, owners of the Huawei Watch Ultimate 2 can now pair various external devices, like heart rate monitors, power meters, speed sensors, and cadence sensors, with the smartwatch. There are also reported enhancements to the overall system stability.

Software version 6.0.0.156 is being released in stages to Huawei Watch Ultimate 2 users (currently priced at €872.03 on Amazon DE). When the update is ready for you, it can be downloaded and installed through the Huawei Health app or directly on the watch by navigating to Settings > System & updates > Software updates.

Source:
Link