I'll research this company.
Let me verify the NPE plaintiff and Sprint's operational details.
Sprint Solutions, Inc. is a Delaware corporation formed in 2002 and a wholly owned subsidiary of Sprint Corporation. Its principal offices were at the Sprint headquarters campus in Overland Park, Kansas (6200/6500 Sprint Parkway); corporate filings in the T-Mobile era list 12920 SE 38th Street, Bellevue, Washington. It was not a separately traded company and did not report its own headcount or revenue — those figures sit with its parent. Sprint Corporation was a NYSE-listed carrier (ticker "S") controlled by SoftBank Group Corp., serving roughly 54.5 million postpaid, prepaid and wholesale customers with net operating revenues of about $33.6 billion for the fiscal year ended March 31, 2019 (per FCC Docket 18-197).
Sprint Solutions functioned as the contracting and sales entity through which the Sprint group sold wireless and wireline services — it signed public-sector, enterprise and distribution contracts on behalf of Sprint affiliates to avoid multiple signatories. The Sprint operating business offered postpaid and prepaid wireless voice/data (Sprint, Boost Mobile, Virgin Mobile, Assurance Wireless brands), devices and accessories, wireline voice/data and enterprise services, and operated as a Tier 1 internet backbone provider. T-Mobile US acquired Sprint Corporation on April 1, 2020, making Sprint an indirect T-Mobile subsidiary; the Boost Mobile prepaid business was divested to DISH Network in July 2020.
Sprint Solutions is an operating company, not a patent assertion entity. The tracked data show 0 cases as plaintiff and 3 as defendant — the classic posture of a large carrier being attacked. All three tracked matters were filed on December 3, 2018 in the Eastern District of Texas, Marshall Division, a historically plaintiff-friendly patent venue.
The three cases are Sol IP, LLC v. Sprint Communications Co. L.P. et al., Sol IP, LLC v. Sprint Communications Company L.P. et al., and Sol IP, LLC v. AT&T Mobility LLC et al., in which Sprint Solutions was named as a consolidated defendant. Plaintiff Sol IP, LLC describes itself as an intellectual property licensing company based in Vienna, Virginia, holding an exclusive license to more than 600 patents from South Korea's Electronics and Telecommunications Research Institute (ETRI). The suits asserted LTE and Wi-Fi standard-essential patents and were consolidated with parallel actions against AT&T and Verizon; Ericsson and Nokia intervened.