Dusseldorf (RP). Once a hacker weaknesses million SIM cards has revealed can be captured by the mobile phones, mobile phone companies give the all-clear. Customers should not have to worry, it is with Vodafone. Telecom and E-Plus insure that their cards are not affected. With O2 to Check if a risk to owners of old SIM cards there. So far nothing is known about it. New nano-or micro-SIM cards used in smartphones are about, encrypted stronger anyway.