Google's move to stop licensing its Android mobile operating system to Huawei could deal a huge blow to the Chinese tech giant's ambitions to become the top player in smartphones globally. The U.S. tech conglomerate has suspended business activity with Huawei that involves the transfer of hardware, software and key technical services. Google made the move in order to comply with Washington's decision to put Huawei on the so-called Entity List, meaning American firms need to get a license to sell products to the Chinese firm. It means Huawei can no longer license Google's proprietary Android operating system and other services that it offers. Instead, Huawei is now only able to use a public version of Google's operating system through the Android Open Source Project. It means future Huawei phones will not have the Google services that users have come to expect on Android devices. "We are complying with the order and reviewing the implications," a Google spokesperson said Monday. "For users of our services, Google Play and the security protections from Google Play Protect will continue to function on existing Huawei devices."

A Huawei spokesperson told CNBC that the company is "evaluating the possible impact of this U.S. government action on consumers." "Huawei has made substantial contributions to the development and growth of Android around the world. As one of Android's key global partners, we have worked closely with their open-source platform to develop an ecosystem that has benefitted both users and the industry," the spokesperson said. "Huawei will continue to provide security updates and after sales services to all existing Huawei and Honor smartphone and tablet products covering those have been sold or still in stock globally. We will continue to build a safe and sustainable software ecosystem, in order to provide the best experience for all users globally." It's a huge blow to the Chinese firm, which relies heavily on Android for the smartphones it sells outside of China. Within China, the company uses a modified version of Android that doesn't have Google apps preinstalled because the search giant's services are blocked there. But in markets outside of China, Huawei's smartphones run Android complete with Google apps.

Just over 49%, of Huawei's smartphone shipments in the first quarter of 2019 were to international markets outside of mainland China, according to Canalys. Huawei was the second-largest smartphone maker by global market share in the first quarter. The company has previously laid out its ambitions to become the top player in smartphones by 2020. But the latest move by Google could put a dent in that. "It will be like an instant kill switch for Huawei's ambition to overtake Samsung in the global market," Nicole Peng, vice president of mobility at Canalys, told CNBC by phone on Monday.

Huawei relies on key components from several other American suppliers for everything from smartphones to its networking equipment. It counts over 30 American firms among its core suppliers. Some of those suppliers, including Qualcomm and Intel, have told employees they will not sell to Huawei until further notice, according to a Bloomberg report on Monday.

Is Huawei prepared?