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3GPP AKA in 2G/3G mixed networks, 2G ME and SIM, 2G or 3G HLR, 2G VLR/SGSN, 2G RAN

2G ME and SIM – Scenario O

The HLR is 2G or 3G and the rest is 2G. There is no difference to the well-known classic 2G case. 2G AKA is executed.