Default [Q] kit kat 4.4.2 Sim management

I have a SM-G900H phone, cosmetically similar to a Samsung S5. It has Android version 4.4.2 ROM. I need to have the ability to turn off the SIM roaming warning or set the 'show roaming reminder' to 'never'. Unfortunately, my phone ROM does not include SIM management in wireless and network settings. I would be grateful if someone could instruct me how I can disable this roaming warning as I cannot make a phone call via blue tooth without acknowledging a roaming warning first when hands free in the car. I have managed to root my phone if that helps!