Some customer who has the legitimate buisness with broadband in different area can ask the exchange authorities to unbind both the connection...say one in his office and one in his house..The facility will be available to any customer who make a request with small charge..However he have to took the responsibility of the billing concern..In the present case, he is trying to use another man id... he is liable to prosecute under Indian cyber law...(I.T. ACT 2000)... when he use another man ID in his computer , he is forging another man account..So it is clearly coming under section 'Forgery' of relevant Indian penal Code.. this is not kid matter My advise is don't burn your finger..