I am really struggling with this, so anyone who can help me, please reply. I set the om0 phone call at blood bowl successfully. I then go to jizzy's on foot and duplicated successfully. However, when I get on a vehicle or bike(I hold tab key ofc) and drive to jizzy's, the om0 call is gone. Which means when I get off the vehicle, the stats shows correctly but there is a phone call comes in ringing. I used the vigilante strat to hold the om0 call for me, the the call is still gone.

did you set your secondary fire key to the same key as action?

Thanks for answering hoxyy! My action key is Tab(foot), fire(vehicle) are RCtrl and LAlt while secondary fire(vehicle) are LCtrl and Num0. They are all default settings. Is there something wrong with my keyboard?

secondary fire in the vehicle needs to be the same key as action on foot for call holding to work in vehicles, so just correct that in your keybinds and it should work

I'll try this out.

It's works. Thanks again for helping me :)