This coming Sunday, 21 February, Samsung will unveil its two latest flagship smartphones; the Galaxy S7 and Galaxy S7 edge. They will be announced on stage at a Samsung Unpacked event the night before Mobile World Congress starts in Barcelona and the world will be watching the livestream to get a glimpse of the new designs.

However, by the time it starts there'll be barely anything to reveal. Thanks to leaks from @evleaks and others, we have already seen some cracking press images of both the S7 and S7 edge. And Samsung's own teaser site gives certain hints that the leaked pics are genuine.

Therefore, we think we know what each of the new devices looks like now.

READ: Samsung Galaxy S7, S7 edge, S7 edge plus: What's the story so far?

What is perhaps more interesting is what they look like in comparison to the previous generation; the Galaxy S6 and Galaxy S6 edge. A touch softer and curvier perhaps?

And what about other Galaxy S models gone by? Just how much have Samsung's flagship handsets changed over the years?

That's why we've put together a timeline gallery of all the major Samsung Galaxy S smartphones from the first to the two expected to launch this weekend coming.

We've ignored variants - the Neo, Plus, Mini, etc - and stuck to the major phones from each line. So flick through our gallery above and see how Samsung has changed its design philosophy as the technology has improved.

And don't forget to join us for the actual Samsung Unpacked event, which we'll be covering from Barcelona. Exciting times for Sammy fans for sure.