Okay so let me see if I can help.
I am using an STA100-3 which is a VERIZON Z30.
First off there are more than 3 Cell Providers is Israel.
I can list more than three off the top of my head (Golan Telecom, Cellcom, Pelephone, Orange, 012 Mobile, YouPhone, HOT Mobile, Rami Levy...)
I am using a my Verizon Z30 on Golan Telecom.
Golan Telecom is the cheapest of all the carriers and they have amazing "Unlimited" deals which have unlimited but throttled data.
Golan Telecom also does not have their own cell towers, they use Cellcom's towers, but use their own APN.
Because I am using a VERIZON Z30, my APN setting are NOT EDITABLE through the normal method (Mobile Network settings).
Verizon BlackBerry 10 devices (at least the Z10 and Z30) come factory unlocked to use in other networks, BUT they hard lock the APN into the device so you cannot even access the APN settings.
The way I had to change my APN was through the device's eScreen. Which isn't a big deal, BUT I believe that because my APN is not changed the normal way I DO NOT GET BLACKBERRY SERVICES which means I cannot BBM over my mobile network (not on WiFi).
I believe if I have a a device that isn't Verizon I would have BlackBerry Services but cannot confirm it is possible that Golan Telecom will not have BlackBerry Services but I know for a fact (before today at least) that they support BB7 devices. So I'm assuming you do not special services to have BBM functioning on BB10.
I know that Cellcom (the provider that Golan Telecom is using towers from) definitely supports BB10 services.
It is possible that they BlackBerry canceled all BlackBerry Services in Israel (very unlikely, I have no idea why they would do that) , but even if they did all that would mean on a BB10 device is that you will be unable to BBM when you aren't on WiFi.
As you can see in the top right of the image I don't have that BlackBerry symbol that indicates you have BlackBerry Services.
Thank you for informing me of this issue I will call Carriers when I get a chance to see what I can find out with all of this.
If I left anything or wasn't clear just comment on this thread and I will clarify.
BlackBerry Z30 Chenpion