Vodafone provides free credits when you switch to Vodafone from another carrier and register your details on My Vodafone within 60 days. It also provides free credits to existing customers when they upgrade their phones, register on My Vodafone and top up at least 20 Euros in one transaction.
For new users, if you use your existing phone, you are entitled to a 10-Euro credit. If you get a new phone, you are entitled to a 5-Euro credit only if you top up at least 20 Euros in one transaction. Vodafone is the world's second largest telecommunications company as of 2014. It has networks in 21 countries and headquarters in London.