Well now, POP is a sort-of fake MVNO, inasmuch as Orange kept the name going after introducing Orange Go, and didn't refer to Orange at all in advertising for it (at least at first).

I was a little bit annoyed after I bought Telepin Mobi -- there was lots of advertising for it at Inmedio newsagencies, but absolutely no price information made available (not even on the paper insert included with the SIM), just "cheap international calls" according to the poorly informed staff. I took a chance on 10 PLN, but having the only way to get the lower rate be via a dialthrough number is just cheating. I'll use it up, but next time I'll just buy a POP/Zetafon card for 5 PLN with 13 PLN credit instead and use the Orange dialthrough. Orange cards all have rubbish lose-all-your-credit non-cumulative expiration, so I will never top up, just buy a new SIM each time, and add the old one to my album...

the first numbers after +48, which has every mvno or mno:)

From this point of view, you're right. There were even many rumours that POP would be abandoned after Idea/Orange rebranding. But things went in a different way - now it's Orange POP and it even lost its old logo :-).

MVNOs from MNI (simfonia, ezomobile, snickers, telepin) - 786 xxx xxx (Orange prefix)
WPmobi - 799 xxx xxx (Orange prefix)
myAvon - 789 xxx xxx (Orange prefix)
mBank - 783 3xx xxx (Plus prefix)
Mobilking - 882 xxx xxx (Era prefix)
Mova - 722 xxx xxx (Plus prefix)
Polsat - 69913, 69914, 69915, 69916, 69917, 69918, 69919, 69910, 69961, 69962, 69963, 69902, 69903, 69904, 69905, 69906, 69907, 69908, 69909, 69900 (own MVNO prefixes)

And do the major operators make the prefixes for regular prepaid services (Tak Tak, Go, Simplus, as well as Heyah, Pop, Sami Swoi, iPlus SIMdata, and 36.6) different from those from postpaid contracts? Heyah, for example, seems to be 884, 886, 888, and 889; are these exclusive to Heyah?

Only Heyah (787, 788, 880, 886, 888, 889) and Sami Swoi (885, 887) have exclusive prefixes. Rest of prepaids and postpaids in one network have same prefixes (eg. Plus and Simplus have same prefixes).

EDIT:
Here you have all polish prefixes: http://pl.wikipedia.org/wiki/Prefiksy_GSM
As I see there 36,6 also have own prefix (725, here marked as 36i6)

Doh, I should have thought about looking in pl.wikipedia! Thanks!

While I'm on the subject, is there a most "prestigious" prefix, such as one of the original Plus or Era ones from 1996, such as 601 or 603? (I mean something like the German prefix 0172, the only one issued by Mannesmann/Vodafone in the early years and is now only rarely issued; SIMs with this prefix are traded at a significant premium on eBay.)

Yes, that's right. But in the past there were some (temporary) numbering differences between postpaids and prepaids. AFAIR POP used to be 5018, 5019, 5028, 5029. Simplus in the beginning was 603 only whereas postpaid was 601 only.

Some more remarks about MVNO prefixes. As of today, the general rule is that most MVNOs use the numbers "passed" to them by their hosting operators. These "number transfers" are not shown in the numbering allocation established by UKE (the regulator). The MNI prefix is a special case, however. 786(0-4) is shown in the MNO table, not MVNO one, with remark "MVNO".

Details of the official allocation are shown here:
http://www.bip.uke.gov.pl/bipurtip/i...t=11&page=text
(Tables T2 for MNOs and T9 for MVNOs, under links there are Excel files)

Hmm, in a way, yes :-). Someone who has 601/603 in Plus, 602/604 in Era or 501/502 in Orange may claim that he/she could afford a mobile phone when it was much expnsive than now :-D. However, there many numbers "recycled". I have a 501 postpaid Orange SIM and I bought only in March 2003.

I'm afraid that Orange just didn't allow Telepin to implement direct dialling with lower rates.
But I don't understand why they offer only the cheapest calls. I think that in case it's impossible to charge various destination-dependent rates via a single accesss number, they should create at least another access number for European mobile phones.

Moreover, I was surprised the calling-card-brand MVNO is Telepin - there were annoucements it was going to be Telebonus...