Disclaimer: I have no connection whatsoever to Lebara, I just used their SIM in the UK and liked it.
I have found a new mobile phone company to recommend to travellers to Munich.
Lebara offers pre-pay (pay-as-you-go) :
- cheap calls within Germany,
- cheap to outside Germany, and
- now also a data flat rate for 30 days of 500 MB at 9.90€. After you have used up the 500 mega bytes, the speed will be throttled from 7.2MBit/s to 64 kBit/s ( = about the speed of dial-up modems in olden days).
As always in Germany (the Lebara SIM comes with a German mobile phone number), all incoming calls are free.
Lebara operates in the T-D1 network of T-Mobile, which is the longest established mobile network in Germany.
It offers very good connectivity, and if you also intend to travel in rural areas of Germany, reception will still be fine.
Their web site is in English: http://www.lebara.de/?isoCode=en_GB
price list for calls: www.lebara.de/prepay/preise?isoCode=en_GB
instructions how to book the data flat rate: www.lebara.de/shop/angebot#offer-dataflat…
You can top up either by credit card or by buying top up credit from a store.
To find a store to sell you the SIM (or to buy top up credit) near your hotel, just put in your hotel address here: www.lebara.de/storefinder?isoCode=en_GB
German law asks for all SIMs to be registered to a person, so before you can use it you will have to activate it online on this web page: https://www.lebara.de/sim-karte-aktivieren…
If you don't activate the SIM, it won't work!
If you have any other questions, here are their FAQ: http://www.lebara.de/faqs?isoCode=en_GB
Please remember that you need an *unlocked* mobile phone to use the Lebara SIM (or any other German SIM).
The phone also has to support GSM900 or GSM1800. i.e. GSM standard with 900MHz or 1800 MHz).
Any triband cell phone (900, 1800, 1900) or quadband (850, 900, 1800, 1900) is ok.
Most of the newer cell phones should work, but please check beforehand.
If your mobile phone isn't unlocked you cannot use a SIM other than the one of your home provider.
So, ask your provider well before your trip to unlock it for you!
If your provider doesn't want to do it, then you can google:
unlock, "your mobile phone type"
to find somebody who will do it online for you either for free or for a fee (around 25 USD).