Phillips played for the Baggies before moving to the Seasiders.
"I had two fantastic years there," Phillips told the Birmingham Mail.
"We played some great football but even in those two years we always shipped goals, we always leaked a lot of goals.
"Going forwards they have got pace and they have certainly got goals in the team. He has done a fantastic job.
"The proof is in the pudding for what he has done at West Brom. When he took over they were languishing in the bottom half of the Premier League shipping goals."