Nokia Siemens Networks is trying to renegotiate a $1.2 billion network infrastructure assets purchase from Motorola, according to sources speaking to Bloomberg. In an effort to please Chinese authorities, which have delayed the purchase due to antitrust concerns, Nokia Siemens Networks is seeking to leave Motorola Solutions’ GSM unit out of the purchase, and adjust the deal accordingly. Chinese authorities began investigating the purchase after Huawei filed a lawsuit against Motorola in January — accusing Motorola of giving its intellectual property to Nokia Siemens. It’s unclear what the new purchase price will be with the GSM unit out of the equation.