I got mine at Berjaya Times Square. The line isn't long and they work pretty fast. (I did make two trips, however because I did an MNP port-in.) Seems like they've got plenty of stock over there.

I'm a bit puzzled though: where do I check whether I'm on iDigi plan? Can't figure it out. So far I just got an SMS from Digi saying "Congratulations! Your switch to DiGi is now complete. We look forward to serving you. For further assistance, bla bla bla." Is it safe for me to turn on my mobile data now? I just got the phone today, around 3pm.