According to the
2012 Nissan Versa Press Kit, the Remote Keyless Entry system was standard on the SV & SL trim levels.
Nissan also offered an
SV Convenience Package:
Bluetooth® Hands-free Phone System, steering wheel-mounted audio
controls, audio upgrade (MP3, SSV, RDS, iPod® control), map light,
front passenger vanity mirror
Here's a link to a free downloadable version of the owners manual for your car:
2012 Nissan Versa Owners Manual