Here are some articles that may help you

Flight and airplane mode

Switching your phone to flight mode disconnects it from the mobile network but still lets you access things like music, movies, and games.

Cat3 and Cat4 devices

Category 3 and Category 4 - what's the difference and what do they mean on our network, using our devices?

Automatic time and date settings

Let our network set the time, date and time zone for you, with Network Identity and Timezone (NITZ).

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