iPhone 4 (16GB) with SuperFlat Internet Weekend contract for ~18€ per month

  

• iPhone 4 (16 GB) without SIM or Network lock
• One time payment: 30€ for the black iPhone, no additional payment for white iPhone
• Free talk-time on weekends to Germany Vodafone network and Germany land-lines
• Internet flat-rate (throttling from 200 MB per month)
• Contract: 24 months, Monthly payment: ~25€, Mediaversand will pay back monthly ~7€. So effective price is ~18€ per month
• Effective total price for White model is ~432€ calculated as follows:  (24 months * ~18€/month) for the iPhone
• Effective total price for Black model is ~462€ calculated as follows:  (24 months * ~18€/month) + 30€ (one time payment) for the iPhone
• Cost of buying the iPhone 4 (16 GB) directly from Apple store is 519€ without SIM card

Here is the deal for iPhone 4 for ~18€ per month
Here is the deal for iPhone 4S for ~25€ per month