Huawei has been around for a quarter century, but it entered the U.S. market with a mobile device only in 2007. It has historically been known as a manufacturer of telecom network infrastructure. Locally, the company made headlines early last year when it sued Motorola Solutions Inc. over the Schaumburg company’s sale of its networks business to Nokia Siemens Networks. Huawei, which had developed network technology to resell under the Motorola brand, said the deal would transfer its trade secrets to a major rival. Motorola also had sued Huawei for alleged theft of trade secrets. The two companies agreed to settle all pending litigation in April 2011, allowing the transaction with Nokia Siemens to close.