this post was submitted on 09 Aug 2023
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Technology
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Back in the day (ow my back) carriers let you control how calls are diverted by dialling one of those * 123*12345# type numbers.
I'm not sure, but I think these USSD/GSM codes still work nowadays.
They'll probably still work. I believe they still form the basis of how the Android settings screen can control carrier settings, though the number of settings available seem to have gone down over the years.
They still work. I use them for routing my voicemail to the Jolly Rodger Telephone Company.