http://en.wikipedia.org/wiki/A5/2
Citat:
In 1999, Ian Goldberg and David Wagner cryptanalyzed A5/2 in the same month it was published, and showed that it was extremely weak — so much so that low end equipment can probably break it in real time.
Since July 1, 2006, the GSMA (GSM Association) mandated that GSM Mobile Phones will not support the A5/2 Cipher any longer, due to its weakness, and the fact that A5/1 is deemed mandatory by the 3GPP association.
A evo kako je kod nasih operatera, jedino Telenor koristi A5/1 enkripciju koja je mnogo teza za provaljivanje, dok mt:s i Vip koriste A5/2 koja je mnogo slabija i moze u realnom vremenu da se slusa razgovor:

Čemu ovo služi, a uz to i ne radi?!?!?!?!
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Fiber on steroids:
http://www.speedtest.net/my-
result/3821970146