Feb 21 (Reuters) - U.S. smartphone sales plunged 10% in January on weak demand for cheaper Android devices and as customers delayed upgrades ahead of the launch of Samsung Electronics' Galaxy S24 series, according to data from Counterpoint Research.

The research firm said U.S. smartphone sales last month were nearly half of the record levels seen in the same period in 2017, underscoring fears that the market may have peaked.

"Tough times in the volume-driven low-end coupled with delayed upgrades in anticipation of new products drove the market lower," said Maurice Klaehne, senior analyst at Counterpoint Research.

Smartphone sales have waned after the pandemic-driven boom, as an uncertain economic outlook and lack of major new features led consumers to stick with their existing devices.

Samsung has tried to drum up interest for its new Galaxy smartphones, which went on sale on Jan. 17, by offering multiple artificial intelligence (AI) functions including a two-way voice translation in real-time.

Counterpoint said the S24 series has performed well in the U.S. market during the initial 1-2 weeks of launch, and that it could spark a rebound in smartphone sales in February.

Apple, meanwhile, continued to gain market share in the U.S. last month, thanks to promotional offers for its iPhone 15 series, and as cost-conscious consumers sought its older iPhone 11 and iPhone 12 devices, whose prices have come down.

"This combination is enabling Apple to maintain stability in a market experiencing double-digit declines," Counterpoint said. (Reporting by Harshita Mary Varghese in Bengaluru; Editing by Vijay Kishore and Devika Syamnath)