@gpatel-fr It's really as simple as, if set to English (Canada): Contact: +15145555555 will reliably be found by prediction once I type +151 Contact 15145554444 will not be found no matter what I type Contact (514)555333 will not be found no matter what I type Other contact formats (514) 555-5555, similarly won't be found. Nothing without the initial +. Anyhow, I'm quite happy about the T9! Many thanks to you for making me aware of it, and for your help in diagnosing things. And many thanks to Lionel for creating the function! My extensive (long-winded) testing was to try to be helpful, but I'm quite satisfied with how things function at present. If the phone number predictions get improved for databases as mangled as mine, and various weird international standards, all the better! But sadly, I don't think I'm the person who will succeed with that.

@d4f0 @messayisto thanks for your replies, I'm beginning to think that there is nothing wrong neither in force-adb nor in systemd (!) and the problems comes from the device tree of the FP5, that is, the kernel configuration. Changing force-adb could be an easy work around but mostly wrong. I'll try to explore the FP5 kernel code to see if I can find the problem all by myself (enthusiasm level: ) Edit: created this gitlab issue to make the problem more visible.

@gpatel-fr Perfect, thank you!