[capableweb]

There are much better alternatives than buying a smartphone if all you want to provide is a 2FA device. Yubikey is one alternative, as a consumer you can buy it for ~50 EUR but I'm sure if you buy 100+ for employees, you can get some sort of deal with them.

[bob1029]

Agreed. This is about much more than just 2FA. Compliance, conference calls, etc. are also on the table.

If we decide to go with a BYOD or other telephony option, then I'm going to push for standardized 2FA hardware devices.

[huhneverthot]

They sold them for $5 for Ignite. I'm SURE you can get them very cheap if you're buying them in any sort of bulk at all.