eSIM.net fully support MNP (Mobile Number Portability) with all UK operators.
To port your number to our Pay as You Go Plan you should firstly contact your current provider and request a PAC code which they are obliged to give you.
Then email firstname.lastname@example.org with the PAC code and your number to be transferred in. Once received it will normally transfer over within 48 working hours. You will also need to purchase a Pay As You Go plan for the number to transfer to.
We also support porting out your number if requested. Just ask us for a PAC code and then forward this to the operator to which you want to port your number.