Level 1: Cadet

text and calls

Recently switched from optus pre-paid to $49 byo plan for telstra and had to unlock my phone. the issue now is that i cant call anyone or receive calls and texting will send the message but the recipient won't receive it and i can receive texts. I;m using an oppo A73

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Level 25: The Singularity
Level 25: The Singularity

Re: text and calls

The Optus firmware on the Oppo A73 has blocked the UMTS 850MHz band (which is required for the Telstra network). It has been a known problem since just after the release of that phone.


You could try the MTK Engineer app from the Play Store to unlock that Band.

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