my pixel 4a has always failed to be detected by the scanners. have tried switching off and on bluetooth, closing and opening the TT app, even restarting my phone. all to no avail. but the TT app can detect nearby TT signals. been using the token but this issue is a pain when my token batt dies. haven't tried my phone with the scanners after updating to android 12, but I'm not hopeful the updated OS will change anything.
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Same issues as you. Havent try on my Android 12 yet.
Mebbe Pixel 6 will fix the issue hor... good excuse to get a new phone