In case you decided to call and got no answer.

I decided to call some people the company said had used the program.

He decided to call the doctor because the thing was in the house.

They decided to call it a day in late 2003.

They had decided to call it a day, that was all.

After a moment's thought, Tom decided to call his mother.

He started to leave the apartment, then decided to call the local fire department.

That was enough and he decided to call it a day.

Until I decide to call you my true and only friend in the world.

Unfortunately when no one in the family could get hold of you, they all decided to call me.