New Delhi, Nov. 4 -- SpaceX has struck a multiyear deal with chipmaker Qualcomm to develop key network technology for Starlink Mobile, as Elon Musk's company steps up its challenge to established US wireless carriers Verizon, AT&T and T-Mobile.

The partnership will see Qualcomm supply cellular infrastructure technology to help SpaceX build a terrestrial mobile network that complements Starlink's satellite-based services. The rollout is expected to begin next year, Qualcomm said on Wednesday. The companies have not disclosed the financial terms of the agreement.

The deal marks another step in SpaceX's efforts to expand beyond satellite connectivity and build a broader presence in the US mobile market.

Under the agreement, SpaceX will de...