Q:

Should I provide login functionality in mobile version?

I am working on a mobile version of the new website for my company, if users visit my website on a mobile device/tablet, they will be asked whether the visitor wants to go to the mobile version or the normal version.
But on the normal version I have login functionality, so users can visit their data and so on. Should I "translate" that functionality to mobile as well? Do visitors login a lot on mobile devices, or is it a waste of time?

A:

The simple answer would be "yes, do it". But I think this is not an easy choice to make if you're asking that here. 
So I think it depends a lot of the kind of service you are providing. For example, the facebook's app would be useless without login feature while I don't really mind if I can't connect to my smashing magazine account on mobile. 
You should take a look at the website's stats. What are the most visited pages ? Without login in, are the users going to miss the main features ?

