The 22-year-old defender has revealed the advice Klopp gave him ahead of his second loan switch VfB.
"He said 'go back and enjoy it'," Phillips told the Stuttgarter Nachrichten.
"It makes perfect sense for me to be back at VfB to accumulate game time. That was the original plan.
"Jurgen Klopp also thanked me for my efforts. But he shouldn't have done that. I am grateful myself."