Will it work on your phone?
VoicePro works on any unlocked 4G or 5G handset that supports VoLTE, which is every phone sold in the UK for years now. The question worth checking is whether yours takes an eSIM, because that is the difference between activating in a minute and waiting for the post.
Search a model, or pick a brand to see the whole list.
Two things only you can confirm
A handset still tied to another network will not take our SIM. If you bought it on a contract, ask that network to unlock it. They must do it free once the contract is paid off.
On iPhone, Settings, Mobile Service, Add eSIM. On Android, Settings, Network and internet or Connections, then SIM manager. If you see an add-eSIM option, you are ready.
Dial *#06# on the handset to see its IMEI. This checks the number is genuine before you use it on a port-in or an insurance claim. It does not identify the model, so use the search above for that.