Mobile Phone 'Clicking'
While I was in Shumen the other day I introduced to a new term and technique here in Bulgaria. Known as 'clicking', folks dial a phone number from their cell, let it connect and ring once, then immediately hang up.
I watched as my host used this technique make contact with taxi companies, who immediately called him back!
Mobile phones in these parts run off pre-pay cards that you fill your phone balance up with. Incoming calls don't typically cost anything to the recipient, and 'clicking' is a way to push the cost of a conversation onto the other party. Used for both taxi companies and friends alike.