Millions of Lycamobile customers have been moved from the O2 network over to EE - but many have claimed the switch has affected their signal.
Lycamobile - which has 16 million mobile customers globally - used to piggyback off the O2 network in the UK, but has now signed a new deal with BT, which owns EE.
If you’re a Lycamobile customer, you should still be able to use your phone as normal - but it will connect to the EE network instead of O2.