O2 launches innovative code-breaking competition only for the tech-savvy

Last week O2 ran an innovative code-breaking competition only for the tech-savvy.  Customers had four days to crack a code hidden within an O2 poster to claim a free OnePlus 3
The tricky formula was displayed on a O2 billboard opposite the Ace Hotel in London’s Shoreditch. The first person to crack the code every day won a brand new OnePlus 3.
Once broken, the code detailed a secret location and password for players to claim their free device. Each day those changed, to see who had what it takes to decipher the new location and password in a challenge of wit and speed. The campaign was created by creative agency VCCP in collaboration with media agency Forward Media and OOH communications agency Posterscope using their Liveposter technology platform.