For those who are for short term in Munich (e.g. one year) and/or need a local phone number with Protected content national minutes, unlimited SMS-es and internet access, I'm happy to give you my sim card. The contract with my Operator (Telekom.de) is valid until October Protected content requires a monthly payment of 36eur.
My win is that I don't have to pay for a number which I haven't used since March this year, while your win is that you get pretty attractive conditions, much cheaper than using prepaid card. Moreover, no mobile operator will do a contract for a period shorter than 2 years, but all of them will ask you for residency and bank account.