We also recommend that you take a close look at the tariffs for your future calls at home and abroad. Do not be fooled by any cheap supplier! Pay attention to the quality, experience, seriousness and competence of the provider. If possible, do not conclude long-term contracts! It is very difficult for you to get out of these gag contracts. If for any reason you are not satisfied with your carrier and its services, you may be forced to continue working with them.
As Friedrich Schiller said in his poem "The Bell Song" in 1799:
"Check who binds (forever)."