A punting phone is riskier for me than a well managed system on my own phone.
My iPhone dual sim, so two SIM cards in the same phone, and setup wa to one and wa business to another which I use for punting.
Literally bought 5 pay as you go sims for £5, so can change number with ease.
So if anyone calls or texts either number my phone rings/pings, and when I occasionally call/text (not wa) from my punting number, just set it to secondary number.
Obviously only useful if you've got a recent iPhone that's dual sim, not sure about Samsungs etc.