
Are the following mentions coreferent?:
<m> announce </m> in T-Mobile has officially announce that they will launch the new RIM BlackBery Curve 8900 sometime in mid-February. Previously, the date of February 11 was leaked. 
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<m> confirmed </m> in T - Mobile Confirms QWERTY - Based BlackBerry Q10 Availability BlackBerry fans take note as T - Mobile has confirmed the availability of the QWERTY - based Q10. Business customers will get first crack with registration beginning April 29th, with consumer availability coming sometime afterwards. T - Mobile says additional details, including availability and pricing, will be shared at a later date. 