I am not a lawyer and anything I write on business contracts cannot be relied upon legally, however I have been reading, drafting and negotiating telecommunications agreements since 1986. Of course every agreement is different but over the years I have noticed three contractual areas that come up regularly.
Initial period extensions
This is a very common trick and one you and your customers definitely need to look out for as often it is buried in the small print. Customer A signs a 36 month contract and a day after the 36 month period expires tries to cancel the service.