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What are the gateway IP and gateway port for China Unicom GPRS mobile Internet access?

The main parameters that need to be set for 2G mobile Internet access are: connection name: Interactive Vision (GPRS), data carrying mode: GPRS, access point name: uniwap, username and password: no settings required. Authentication: Normal, Gateway (proxy) IP address: 10.0.0.172, Connection security: Off, Connection type: Permanent, Optional port: 80 or 9201.