You can get a new eSIM account or replace your existing physical SIM with an eSIM by visiting any Etisalat Business Centre or outlet.
Yes, you can always replace your eSIM with your physical SIM by visiting any Etisalat store. You will be charged a SIM replacement fee of AED 25 (5% VAT excluded).
If you are an existing Multi SIM user, you can replace only one physical SIM with an eSIM at a time.