Samsung will sell two versions of its next flagship phone, one of which has a screen that curves round its sides.
The Galaxy S6 Edge uses the feature to provide a quick way to stay in touch with select contacts, and to alert owners to important information.
It will be sold for a higher price than the standard S6, which otherwise has the same specifications.
Samsung lost market share to Apple and others after the S5 sold fewer copies than its predecessor in many countries.
Its replacements were unveiled in Barcelona, ahead of the start of Mobile World Congress. They go on sale on 10 April in 20 countries.