Telstra SIM card works, Optus SIM card makes phone unusable

I’ve recently received my pebble gray Mudita Pure. The phone looks great and feels great to hold. I have noticed a problem with how the phone behaves depending on what SIM card is used.

I’m in Australia where the two largest mobile phone networks are operated by Telstra and Optus.

I have two SIM cards - one is for Southern Phone which connects to the Optus network and the other is for ALDImobile which connects to the Telstra network.

When I try to use the SIM card that connects to the Telstra network, the phone just works without any problems.

When I try to use the SIM card for the Optus network, the phone will appear to lock up and pressing the keys on the front of the phone will do nothing. However, pressing the right selection key (top most, right most key on the front of the phone) will cause the phone to reboot and start the first time set up process again. Trying to use the Optus SIM card puts the phone into a state where it is completely unusable. I wasn’t even able to turn the phone off until I took out the Optus SIM card, as pushing the right selection key would only cause the phone to reboot and not turn off.

Do I need to log a support ticket for this issue, or is this a known bug that will be addressed in a future release of MuditaOS?

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