ZTE deposited US$400 million in an escrow account to meet the US' demands, the final part of a deal that also included the company paying a US$1 billion fine, Reuters reported.
The Chinese company was hit with a seven-year ban on using American-made parts in its equipment in April for violating the terms of an agreement over breaking sanctions on exporting products to Iran and North Korea.
ZTE shut down its main business activities in the US on 9 May.
Reuters quoted IDC analyst Nikhil Batra as saying on Monday: "“It’s a long way back for ZTE. Not just to win back customer confidence and assure them, but also work hard to find substitutes to U.S. suppliers such as Avnet, Qualcomm, Broadcom etc (to reduce reliance).
“Essentially, this would mean going back to the drawing board and rethinking its overall design strategy.”
ZTE's shares opened up 5.5% on the Hong Kong index and then rose by more than 17% to HK$16.12 by noon. But that was still 37% lower than when the shares stopped trading in April.
Some politicians in the US are trying to rescind the deal, and have inserted material in the Senate version of the National Defence Authorisation Act that would reinstate the ban.
But US President Donald Trump is expected to negotiate and get the ban stripped out of the final version of the bill. The House has already passed a version of the bill that does not include the sales ban.