[The Big Picture]

Why not BBM?

Clearly it's not a limitation of iOS rather it's a limitation on BlackBerry giving a toss.

Posted via CB10

[Elite1]

Since iOS 7, there were several IM-type apps that had issues with delivery being pushed after the app was closed or even dormant for too long.

Yes, BBM was/is one of these. IIRC some other major ones included Snapchat, but can't recall the other notables.
(As I don't have an iOS device, this is all hearsay that seemed reliable to me at the time.)

Regardless, you're right enough. If WhatsApp can do it, why can't BBM?

[Thesmartmale]

Why not BBM?

Clearly it's not a limitation of iOS rather it's a limitation on BlackBerry giving a toss.

Posted via CB10

BBM can, you just don't get the D for delivery, just like WhatsApp, you only get one tick not two for delivery so please understand it's an IOS limitation.

Posted via CB10