Re: But...
(1) what's so bad about having a bucket full of old fobs?
(2) and anyway, you should be able to just hand it back in (to employer) or post back to supplier, under the hated WEEE Directive; or just chuck it in your recycling with your other bits and pieces of waste electronics.
SMS two-factor is a joke. Almost as bad as SSL "VPNs"... (and don't get me started on SSL VPNs that use SMS 2fa!)