Also, use a dual SIM phone. Buy a PAYG SIM at your destination and use it for data. Then you remain contactable at your primary number. I got a dual SIM phone

Also, use a dual SIM phone. Buy a PAYG SIM at your destination and use it for data. Then you remain contactable at your primary number. I got a dual SIM phone three years ago (One Plus in my case), best thing ever. It's also one reason why I won't consider using iPhone.