Research in Motion on Tuesday unveiled prototypes of the new BlackBerry phone hardware and software that it hopes will be its salvation. But the company’s demonstrations of the far-from-complete products again raised concerns about its ability to produce final versions on schedule and stay in the fight against Apple and Android phone makers.

RIM has effectively staked its future on its new BlackBerry 10 operating system. The need for the company to drastically overhaul its line of smartphones, which once dominated and defined that market, was underscored by an analysis released by IDC on Tuesday. It estimated that BlackBerry’s global market share fell to 6.7 percent during the first quarter of this year, roughly half of what it was in the same period in 2011.

“They’re not being stupid; they’re doing everything they can,” said Mike Abramsky, who recently left RBC Capital Markets, where he covered RIM as an analyst for a decade. “But this is about the challenges of being late to the game.”

At a company-sponsored conference for large customers and software developers in Orlando, Fla., where the prototype phones were given to about 2,000 developers, Thorsten Heins, RIM’s chief executive, made it clear that the company must shake its recent reputation for promising more than it could deliver. RIM has said the phones will be on the market by the end of the year.