Complex sentence: For many years Nokia and Ericsson have been pushing a "see what I see" capability, but this has failed to be be taken up by operators, or the way it was deployed failed to result in great take-up by consumers.
Split into simpler sentences: For many years Nokia and Ericsson have been pushing a "see what I see" capability. Or way it has been deployed as failed to result in great take-up by consumers.