Sharing three network

With the merger of Three/Vodafone does lebara switch to three if a better signal?, as I am reading conflicting stories that not all MVNOs of three/Vodafone do switch between?
Thanks

Myself I’d prefer Lebara switching to EE.

I doubt that will happen EE mnvno costs more and they would need to reissue sim cards to everyone again which adds costs.
Vodafone + three will be the biggest network once combined and with lots of investment coming should be great.

Could a member of the support team elaborate on whether we will see Vodafone / 3 sharing, as I already use Smarty and that already does, thanks.

Lebara are the only network that are not using both networks very poor by them

smarty
talk mobile
voxi
Superdrug mobile
Asda mobile
id mobile

are all using both networks giving better signal and speeds

Eventually it will happen once networks fully merged

I've just used cell mapper with my Lebara Esim and it's saying 3 UK