Confirmed same behavior, user-agent with the physical developer device.

I guess we need to update our Device Detection see bug 37526 for instructions on how this can be done.

This doesn't make sense :-(
I updated tests (https://gerrit.wikimedia.org/r/31581) and it suggests that this should be redirecting.

I guess the varnish configuration is working slightly differently..
https://gerrit.wikimedia.org/r/gitweb?p=operations/puppet.git;a=blob;f=templates/varnish/mobile-frontend.inc.vcl.erb

Ugh, I hate all that X-Device stuff ...

I'm trying to make sense of the Varnish config; it looks like BB10 will be detected as "webkit"... but that would surely detect Chrome and Safari and whatnot on desktop as well, which obviously don't get redirected. So either I don't understand something in how this thing works, or I don't understand why it doesn't redirect those browsers. ;)

Still not redirecting after latest BB 10 dev alpha update.

Mozilla/5.0 (BB10; Touch) AppleWebKit/537.10+ (KHTML, like Gecko) Version/10.0.9.1103 Mobile Safari/537.10+

This device is probably missing the squid ACLs that determine whether or not the request should be forwarded to mobile varnish. Looking quickly, I don't see any rules there that the UA would match. AFAIK these ACLs are only visible on Fenari in /home/wikipedia/conf/squid/mobile_acls.conf

Looks like someone needs to add "mobile" to that list... and maybe remove a bunch of other things that become unnecessary. :P

Setting bug 40919 as a dep, since fix for that fixes this.

Fix for bug 40919 was just deployed, so this should be fixed as well, per comment 8.

Confirmed fixed -- zh.wikipedia.org and fr.wikipedia.org now redirect to mobile on my BB 10 alpha device. :D Thanks!