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2. Dual SIM - Wikipedia

   en.wikipedia.org/wiki/Dual_SIM

   Some mobile phones support use of two SIM cards, described as dual SIM operation. When a second SIM card is installed, the phone may allow users to switch between two separate mobile network services manually, have hardware support for keeping both connections in a "standby" state for automatic switching, or have two transceivers to maintain ...

3. 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).

4. List of mobile virtual network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Providers supporting multiple host networks use only one of them for each device, depending on the specific phone model and/or SIM card used (except for Google Fi Wireless, which switches automatically between the different listed host networks based on factors such as relative signal strength). [4]

5. The next generation of phones will make SIM cards obsolete

   www.aol.com/news/2015-07-17-the-next-generation...

   The SIM card is what connects a cellphone to the network, but since it's proprietary of each one, it is a pain to use when traveling and you need to switch from one carrier to another.

6. 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.

7. Redmi 9A - Wikipedia

   en.wikipedia.org/wiki/Redmi_9A

   The phone's storages has a 32, 64, or 128 GB configuration with a 2/3/4 GB RAM, depending on the variant: The Redmi 9A was sold in configurations of 2/32GB, 3/32GB, 4/64GB, 4/128GB, and 6/128GB. In Ukraine, the smartphone was only available in the 2/32GB configuration. The Redmi 9AT was sold in the 2/32GB configuration.