Lags will be climbing over themselves at the gate to get in, never mind hatching plans to escape! And they won't need any IT lessons, judging by the amount of stolen phones and computer gear that changes hands on the net.
On TV you see kingpins running their crime empires from prison in luxury. It seems they are opening such luxury up to average criminals.
Part of how you rehabilitate is to deter criminal behavior by saying prison sucks don't come back. this seems counter-productive.
It also seems to limit the punishment value. Prison is:
1) to keep criminals away from the public to protect the public
2) to punish
3) to deter wronging
4) to try to rehabilitate
Giving them phones and computers seems to undermine all of these, it can let them victimize even from prison.
I think the best prison would be one that makes them work to pay for their keep. That would teach them some skill and make them know they will have to work one way or another so might as well go straight and work outside of prison. Maybe even have some of the work be useful trades they can apply outside of the prisons.