There was installed some malicious software (properly spyware) on my last smartphone that was able to also control the connectivity of the phone. As I have read that this is a sign of software with root access, I could not be sure that this malicious software would be deleted by a factory reset. And therefore I bought a new hopefully more secure phone - a Blackberry. I then ordered a new sim card for my existing subscription. I guess the new sim card will connect to the same server account that is related to my subscription. Will there then be a security risk in using this sim card in my new phone ? Meaning, could the stalker also have got some informations related to my subscription that makes the person able to connect to my new phone ?