I heard the NBC news broadcast. The commentator read it like it was a scolding.
Spinning the News?
Probably. My Spanish isn't the best, but based on his tone of voice, it seemed like he was joking around with them.
Click here to hear the recording.
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«¿Qué andarán haciendo las monjas que no pueden atender? Soy el Papa Francisco, quiero saludarlas en este fin de año, veré si más tarde las puedo llamar, que Dios os bendiga»
My Free Translation --
What are the nuns doing that they do not answer? I am Pope Francis. I wish to greet you on this New Year's Eve. I see that it is very late that I have called you. May God bless you.
Yes, without the twinkle in the Pope's eyes, his voice, and his smile, one would not know from just reading the script.
"veré si más tarde las puedo llamar" is "I'll see if I can call you later" (i.e., I'll try you again to see if you'll pick up, since I missed you right now)...for their own sake, I hope someone will pick it up then!
Wouldn't want Sister Mary of the Phone to be put on habit-cleaning duty for the next month!
(And, yes, there's no real scolding going on here. It's pretty clearly a light-hearted ribbing. Pope Francis' accent is pretty funny, too.