Sales of BlackBerry’s (BBRY) new flagship BlackBerry Z10 smartphone are reportedly slumping in the United Kingdom after having gotten off to what appeared to be a strong start. Following up a note from last month that cast doubt on the likelihood of BlackBerry returning to sustained profitability, Pacific Crest analyst James Faucette claimed in a recent note to investors that Z10 inventory is building up across UK sales channels.

“Our checks indicate that as sell-through run-rates for the Z10 have declined meaningfully in the weeks following launch, we believe carriers and third-party retailers in the U.K. are already well above typically targeted inventory levels,” the analyst wrote in a note picked up by Forbes. “Canadian carrier stores and retailers also appear to be rapidly approaching targeted levels, in our view.”

He also voiced concern over the recent Z10 price cuts at Carphone Warehouse and other retailers.

“We continue to believe that the company likely shipped roughly 275,000 to 325,000 Z10s in the February quarter for the U.K. and Canadian markets,” Faucette wrote. “Further, we estimate that the company is likely to ship one to two million units in the May quarter, with sell-through likely well below that figure. As such, we believe optimism around BBRY is overdone at current levels and would remain sellers.”

Zach Epstein has worked in and around ICT for more than 15 years, first in marketing and business development with two private telcos, then as a writer and editor covering business news, consumer electronics and telecommunications. Zach’s work has been quoted by countless top news publications in the US and around the world. He was also recently named one of the world's top-10 “power mobile influencers” by Forbes, as well as one of Inc. Magazine's top-30 Internet of Things experts.