Yes, this was mentioned in the phone number bugs doc :) It's the last in the list though as it is the lest common and depends on fixing the other bugs first.

just realized it is already fixed with: https://chromium-review.googlesource.com/c/chromium/src/+/755853

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/449cae27aa8a3053f77fb8e9d440c62be77e88a6

commit 449cae27aa8a3053f77fb8e9d440c62be77e88a6
Author: Hui(Andy) Wu <wuandy@chromium.org>
Date: Wed Dec 06 15:21:56 2017

[autofill]Always override autocomplete=tel/tel-* with server prediction for phones.

Many web sites set autocomplete to wrong tel types. For example, they set it to
tel but then expects a national number(Sephora.com). This change overrides all fields
with autocomplete attribute set to tel/tel-* with server predictions, as long as
server thinks it's a phone number field as well.

Bug:  791569 
Change-Id: If2c8bea2e0f7d1fed71f019d4756670e62e8ce1c
Reviewed-on: https://chromium-review.googlesource.com/809092
Commit-Queue: Hui Wu <wuandy@chromium.org>
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522093}
[modify] https://crrev.com/449cae27aa8a3053f77fb8e9d440c62be77e88a6/components/autofill/core/browser/autofill_field.cc
[modify] https://crrev.com/449cae27aa8a3053f77fb8e9d440c62be77e88a6/components/autofill/core/browser/autofill_type.cc
[modify] https://crrev.com/449cae27aa8a3053f77fb8e9d440c62be77e88a6/components/autofill/core/browser/autofill_type.h
[modify] https://crrev.com/449cae27aa8a3053f77fb8e9d440c62be77e88a6/components/autofill/core/browser/field_filler_unittest.cc

I'm trying to use autocomplete='tel' because yes, I really do want the full telephone with country code, but I'm getting a warning in Chrome:

[DOM] Input elements should have autocomplete attributes (suggested: autocomplete='tel-national', confirm at https://goo.gl/6KgkJg)

How does the server prediction work? How can I force it to use autocomplete='tel'?

Hi jgrucza, 

Sorry to hear about this issue. Server predictions are based on the name of the field. Changing the name of the field to something else (like "fulltel") may reset the server prediction for your site.