The ZTE-MF626 needs a hal-info rule to get going.
They are common enough to cause problems for many users as searching reveals.
Would it be possible to include Chris' halinfo rule in step 4 of URL for an offical hal-info rule.
I've confirmed it works on one install.
until I merge it upstream, check here:
Author: Danny Kukawka <email@example.com>
Date: Mon Mar 8 15:28:10 2010 +0100
add ZTE-MF626 as modem
Added ZTE-MF626 as modem. fd.o#24165
on Jan 24, 2017 at 09:07:14.
(provided by the Example extension).