Abstract. Mobile networks differ widely in their pro- tection capabilities against common attacks. This report details the protection capabilities of three mobile networks in Hong Kong.

1O1O and SmarTone implement sufficient 3G intercept protection.
Users of CMCC HK are not sufficiently protected from 2G intercept. In all 2G networks, user impersonation is possi- ble with simple tools. CMCC HK allows user tracking.

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