"I don't have a phone number, it's data only and my house doesn't have good reception" is what a number of ex-colleagues used when asked to be on-call at compan

"I don't have a phone number, it's data only and my house doesn't have good reception" is what a number of ex-colleagues used when asked to be on-call at companies that asked for it, but gave you nothing for it. For companies that paid you overtime, it often starts with guilt, "well the rest of the team did it last week/month/year, it's your turn". If they don't incentivize you enough to do it, don't do it.