It was Garner who dumped the icy water over Affleck's head to help him complete the challenge but Garner says she did not know that he will grab her and jump into the pool otherwise she would have removed her phone from her pocket.
"If you drop your phone, or if your husband tosses you in the pool on the ALS Challenge and you weren't expecting it, and your phone was in your back pocket and it got killed... you have to go a day without your phone!," Garner, 42, told Access Hollywood.
"I had a day without my phone, and at first, it was, 'Ben, you could have told me, so I could have taken it out of my pocket'. But it was so liberating not to have it and not to check it, and just be like, 'Well, people will have to call me (at home) if they need me!'," she said.