In other words, how safe is having Gmail or Skype conversations with complete strangers on android? Suppose the target is wise enough to not open any suspicious files sent to him. How else could his phone be hacked?
I have heard that it is possible to know the ip address of the sender on Skype. But a cyber criminal knowing your ip address is the same as a burglar knowing your address. The information is necessary but not immediately sufficient.
Also, which, between Skype and Gmail is safer for the user in these cases? I guess Gmail is safer, but don't know why and by what amount. Also, how exactly does the danger increas for users using old version of the android- like 5.1 or 4.4.2, let's say? I guess the older the version, more the risks.
Sorry for sounding paranoid, but one is afraid of things one does not understands, they say. Thanks for helping...