The defender told evertonTV: "Jags has got my old number and I wish him all the best.
"We played against each other for the past five years and been together at England Under 18s level.
"He did exceptionally well in the Championship as well as in the Premiership last season for Sheffield United but unfortunately they got relegated. Fortunately for us we have got their best player."
Jagielka has settled straight into the Everton camp - but Lescott is not surprised.
He added: "Everyone makes it easy here when you are new and it was the same when I first came here."