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From phones the size of your head to the super-slim smartphones of today, cellphones have changed dramatically.

Over the decades, everyone has owned a cellphone they have loved—or even hated. And device-makers have experimented over the years to bring out the next groundbreaking device, from flip phones, to slide phones and touchscreens.

Now, the mobile space is fiercer than ever before, with over 1.7 billion handset shipments in 2014.

CNBC takes a look at some of the most iconic mobile phones of the last 30 years...

By CNBC's Arjun Kharpal