Easy two steps. Actually its a good techniques I never thought it before. My friends did it before. Previously I have a log in error problem while i trying log in to skype. I bored to see such boring message from skype. Now come to the point. 1. Check the phone by which your friend can log in to skype easily without any eror message. 2. Now you send that application to your phone using share it or zapaya any file sharing apps which you have. I have solve my problem by doing this. I hope you may get solved your problem.