It is very rare that the providers on our website change the rates from the rates that are listed.  Unfortunately there is not any guaranteed period for the rates you sign up for, but if the provider does happen to change the rates, you will be informed directly.  At that point, you can either stay with the provider or look for alternative options.  We find in a lot of cases that the long distance providers we review, actually opt to lower rates.  (i.e. ECG just introduced the Easy 2.5 plan to replace their already popular 2.75 plan!)