Samsung Galaxy S7 is one of most powerfull Android phones - with one of two very powerfull SoCs (Snapdragon 820 or Exynos 8890 Octa), 4GB RAM, 32 or 64 GB storage expandable with microSD cards. Display is simply awesome.
So what's problem? Major in many cases are price. It starts around $500. So many people take them with contract for just part of this price but it have ne drawback: simlock.
So if your phone is locked use simply link below, prices starts at 5.49 EUR and wait time in most cases is up to 4 days (varies from service chosen)

See More: Unlock for Samsung Galaxy S7