Reuters reported that the US Government had been hard at work trying to convince Deutsche Telekom, the majority owner of T-Mobile, to drop Huawei as a supplier.
Sprint and T-Mobile agreed to the merger in April. Sprint's majority owner is the Japanese company SoftBank that has worked with Huawei.
The merger between the third and fourth biggest wireless carriers in the US needs the approval of the US Committee on Foreign Investment.
Last month there were reports that the US was stepping up the pressure on its allies to give the cold shoulder to the Chines firm which is the world's biggest supplier of telecommunications equipment.
On Thursday, the Japanese news agency Nikkei reported that the SoftBank Group planned to replace 4G network equipment from Huawei with equipment from Nokia and Ericsson.
Huawei has been thrown into the centre of the ongoing US-China trade row after its chief financial officer, Meng Wanzhou, was arrested by Canada on 1 December, due to her alleged involvement in sanctions busting through the sales of US products to Iran.
US President Donald Trump has said he may use Meng as a bargaining chip to obtain a better deal with China.
iTWire has contacted Huawei for comment.