Users of mobile devices in St. Margaret-at-Cliffe and St. Margaret's Bay near Dover said they regularly get "Welcome to France" messages when using their phones, the BBC reported.
This has resulted in extra costs including data roaming charges from their British cellphone service providers, they said.
The villages are blocked by the white cliffs of Dover from receiving British signals and residents are sometimes connected to the French network, depending on atmospheric conditions and the weather.
"We are a little telecommunications enclave of France here," Nigel Wydymus, landlord of the Coastguard pub and restaurant, said.
"Obviously people strolling along the beach in England do not expect to be on a French network and so, unlike when they get off the plane in Spain or elsewhere, they haven't switched off their data roaming and it causes some extra bills," he said.
The cost of calls made on the French network can be as much as four times that of using a British network, the BBC said.