Aurora Mobile Announces 5G Compliance Test Completion for its JG Unification Messages System Aurora Mobile Announces 5G Compliance Test Completion for its JG Unification Messages System SHENZHEN, China, Feb. 04, 2021 — Aurora Mobile Limited (NASDAQ: JG) (“Aurora Mobile” or the “Company”), a leading mobile developer service provider in China, today announced that its recently-launched JG Unification Messages System (“JG UMS”) version V1.0 was tested by China Telecommunication Technology Labs (“CTTL”) and found to be compliant with the standards of the 5G Messaging Platform’s Functional Completeness Test Methods V1.0 FG-Z14-006-01. Compliance relates to JG UMS’s system functions, push notification methods and performance, reflecting full compatibility with 5G messaging.