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2. Telephone numbers in China - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_China

   China Unicom (include contract phones without SIM cards inserted, even dialed 110/119/120/122): Hello, please dial 110 for police, 119 for fire, 120 for ambulance, 122 for traffic accident, and dial area code before 112 for fixed phone obstacle. China Telecom (include contract phones without SIM cards inserted, even dialed 110/119/120/122 ...

3. Dual SIM - Wikipedia

   en.wikipedia.org/wiki/Dual_SIM

   [1] [2] In countries where dual SIM phones are the norm, people who require only one SIM leave the second SIM slot empty. Dual SIM phones usually have two unique IMEI numbers, one for each SIM slot. Devices that use more than two SIM cards have also been developed and released, notably the LG A290 triple SIM phone, [3] and even handsets that ...

4. List of countries by number of mobile numbers in use

   en.wikipedia.org/wiki/List_of_countries_by...

   It is common for each SIM card has a separate phone number, so phones with multiple SIM cards will have multiple phone numbers. As another caveat, some mobile phone numbers may be used by machines as a modem, such as intrusion detection systems, home automation, or leak detection, and some numbers may be used as a local micro-cell.

5. List of mobile network operators - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

   For a more comprehensive list of mobile phone operators, ... China Mobile Communications Corporation ... 2: Globalstar: Proprietary CDMA: 0.638 (March 2015) ...

6. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).

7. China Mobile - Wikipedia

   en.wikipedia.org/wiki/China_Mobile

   China Mobile is the trade name of both China Mobile Limited and its ultimate controlling shareholder, China Mobile Communications Group Co., Ltd., a Chinese state-owned telecommunications [6] company. It provides mobile voice and multimedia services through its nationwide mobile telecommunications network across mainland China and Hong Kong. [2]