I am new to the whole smartphone thing. Currently all of my telephone contacts are on my SIM card. I suspect it makes sense to move all my phone numbers from the SIM card to my Google contacts (i.e. adding the numbers to existing Google contacts who mainly contain only email addresses). The benefits would be: (a) no more duplicate contacts in my list, (b) automated backup of my contact's phone numbers.

Or, is there something I should be aware of before I do this effort? Will there be some workflow side effects? (apart from not having my contacts on SIM anymore)