The Lumia 920 and 820, which use Microsoft's latest Windows Phone 8 software, were launched last month with expectations of a "make or break" for Nokia, once the undisputed leader in mobile phones, now losing share in smartphones and lower-end handsets.
Positive online reviews and anecdotes of waiting lists for the 920, as well as Nokia's sales deal with China Mobile announced earlier this month, have helped Nokia shares rise over 40 percent in the past month.
But analysts say there's no proof that Lumia phones are making significant inroads on market leaders Samsung and Apple or that Chief Executive Stephen Elop's risky strategy of betting the company's future on Windows software was paying off.
"I think people are looking and saying, 'Hey, there aren't enough 920s in the market', but the reality is that the volume is so small. It's not going to move the needle," said Pacific Crest Securities analyst James Faucette.
Most analysts forecast Nokia will sell around 5 to 6 million Windows Phone devices in the fourth quarter, with over half of them older versions of Lumia, which have been heavily discounted.
That would be better than the 3 million Lumia smartphones sold in the third quarter, but it pales in comparison with Samsung, which champions Google's Android system and is expected to ship 60 million smartphones in October-December.
Supplies of the new Lumia models appeared to be trickling back into US stores this week after being unavailable at many stores since their November launch.
Best Buy's website showed 920s in stock, and Amazon listed them as the No 2 best-selling AT&T phone on December 20, though they were still sold out in many European markets including Nokia's home base, Finland.