Huawei
Enable or Disable Data Roaming auf Huawei
When a Huawei phone connects to a network outside your home carrier, the system blocks mobile data by default. This is a safeguard, since using a foreign network almost always triggers extra charges from your provider. Data roaming has to be switched on manually before calls, messages, or mobile data will work through that foreign network.
To change the setting, go to Open the settings ➔ Tap on Mobile network ➔ Tap on Mobile data ➔ Activate or deactivate Data roaming ➔ Confirm with OK.
When to leave roaming off
If you are traveling and want to avoid unexpected costs, keep roaming disabled and rely on Wi-Fi instead. Some providers offer roaming packages or flat rates; check with your carrier before switching it on for an extended trip.
When to turn it on
Enable roaming only when you actually need mobile data or calls on a foreign network, for example during short business trips or when no Wi-Fi is available. Turn it off again once you are back on your home network or once you no longer need the connection, so it does not stay active by accident.