Vodafone

(VOD) - Get Report

, the London-based mobile-phone company, was up 7.4% in midmorning after it posted strong first-half profits and helped Britain's

FTSE 100

index to a gain of more than 100 points Tuesday.

Vodafone was also boosting other mobile-phone stocks traded in the U.S.

Nokia

(NOK) - Get Report

was up 4.5%,

Ericsson

(ERICY)

was up 3.8% and

Motorola

(MOT)

was up 4.9%.