Contract has ended

<p>I don't understand how does this work,my husband's contract has ended and he is not renewing because Vigin doesn't have smart phones I mean simple...what I don't understand is why the is the sim going to be blocked and...you just migrate it to prepaid,this is one of the reasons why customers leave this service provider ...it doesn't make senses.</p> <p> </p> <p>he is still paying or can you convert to BYO