Simpler rules have been put in place to allow Britons to switch broadband supplier in just one phone call.
The change in regime will take over the previous setup which was described as "confusing". The old setup meant different systems were used for some services and suppliers.
However critics say the change may not end up being faster because of a 10 day notification period built into the process.
Critics add that the changes might mean more attempts to switch people without their permission.
The new rules have been drafted by regulator Ofcom and apply to both broadband and landline services from BT, EE, Sky and TalkTalk, which uses the OpenReach network.
The new rules came into place on the 20th June and will allow anyone who wants to change broadband supplier to now only have to notify the company they wish to move to. That supplier will then handle every aspect of the change.
Ofcom boss Sharon White said the change would help people "take advantage of very strong competition in the landline and broadband markets".
Ofcom also warned people that they may face early termination charges if they tried to switch before a minimum service period or contract period has expired.
Critics have suggested the new system could be more open to abuse and mistakes however.
Sebastien Lahtinen from Broadband site ThinkBroadband said the updated rules removed some confusion from the whole process, but might not actually end up being quicker as they did away with the faster MAC migration options that some ISPs offered.
He added: "We don't feel this change is going to substantially increase migrations per se although as the new system stops a losing provider from offering a retention deal after they receive a migration request, this may increase migration rates slightly."
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