The company promises a software fix after a British couple discover any fingerprint can unlock the flagship device.

Three says it is experiencing “technical difficulties with voice, text and data”.

Millions have no access to the internet despite it being one of the fastest-growing markets.

The operator is going head to head with rivals EE, Vodafone, Three and BT Mobile.

A plan to force porn sites to verify users’ ages will be shelved, says Digital Secretary Nicky Morgan.

The site, run from South Korea, had hundreds of thousands of videos containing child abuse.