O2

Took them nearly 4 weeks to sort mine. Good luck.

I've become somewhat of an expert on porting, split ports and PAC codes thanks.

Sorted now, took 4 weeks, for that reason I'm out. Will be leaving shortly.

Tried that too, still not working properly. Been with O2 for 27 days now.

Exactly the same, told me I could activate iMessage when SMS are still being delivered to my old Three sim. They had no idea how iMessage activation works, after that they ignored me.