Um guys, A5/3 is completely broken. According to Wikipedia: "In 2010, Dunkelman, Keller and Shamir published a new attack that allows an adversary to recover a full A5/3 key by related-key attack.[5] The time and space complexities of the attack are low enough that the authors carried out the attack in two hours on an Intel Core 2 Duo desktop computer even using the unoptimized reference KASUMI implementation. The authors note that this attack may not be applicable to the way A5/3 is used in 3G systems; their main purpose was to discredit 3GPP's assurances that their changes to MISTY wouldn't significantly impact the security of the algorithm."

Even if A5/3 weren't broken, there are still tower dumps and IMSI catchers, which are a whole lot easier to use than breaking encryption. Yes A5/3 is better than A5/1, but I call bullshit on this whole article.