I bought a Nokia Lumia 520 which is said to be decoupled ("independent") from telco providers. It seems to be decoupled (I can use it with any SIM) but when I turn the phone on, the first thing I see is a huge Vodafone logo.
I bought it in Hungary but the box of the phone is written in Italian language (Nokia Sales International Oy, Sede Secondaria in Italia). Is it possible that the phone first was sold in Italy in Vodafone system (like monthly subscription and + 0 euro for the phone), then decoupled illegally and sent to Hungary to sell again?
How can I be sure that my phone came from legal source? I checked its IMEI number, it said, it still has warranty. But what happens when Italian Vodafone provider realizes that noone pays the monthly subscription and blocks my phone?