The maker of the Blackberry device has reached a $612.5m (Ј349m) settlement to end a legal dispute that could have closed the service in the US.
Canadian company Research In Motion (RIM) said on Friday that the deal with American software firm NTP represented a "full and final settlement".
NTP, which had claimed RIM stole its technology, had tried to get the Blackberry service shut in the US.
The popular portable email device has three million American users.
'Unfettered right'
"All terms of the agreement have been finalized and the litigation against RIM has been dismissed by a court order this afternoon," said RIM.
"The agreement eliminates the need for any further court proceedings or decisions relating to damages or injunctive relief.
"NTP grants RIM an unfettered right to continue its business, including its Blackberry-related business."
The settlement brings to end four years of legal dispute in the US between the two companies.
RIM said it had already put aside $450m for a possible settlement with NTP, and that the additional $162.5m would be recorded in its next quarterly report due in April.
The overall $612.5m settlement compares to the firm's total cash reserves of $1.8bn.
Global popularity
Last year the firms agreed a tentative settlement, but the agreement subsequently collapsed, taking the case all the way to the US Supreme Court.
Earlier this month, the US government asked a federal judge to hold off from a possible shutdown of the Blackberry service, because of the system's popularity among key government employees.
RIM had argued that a shutdown of Blackberry services would impair critical public services.
The Blackberry now has 4.3 million global users.
(BBC)
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