Martin Lewis has warned customers of Plusnet Mobile to switch providers before its closure in the "coming months".
The financial expert took to Twitter on Tuesday to warn: "Are you a Plusnet mobile SIM card customer? If so it's closing it down and you'll need to move."
Plusnet only offers SIM cards - not mobile phones with contracts - so customers will need to switch providers to keep using their mobiles as normal. Switching providers before the closure will also mean users will be able to keep their mobile phone numbers.