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

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

   No, plans capped at 13 GB max (after purchasing up to +5 GB at $10/GB), however can carryover ununsed data every month [522] No, plans do not slow and are cutoff upon reaching limits [524] Yes [525] Yes, carried over data can be used for tethering too Yes, int'l calling from U.S. [524] Yes [100] Owned by Verizon. Previously owned América ...

3. Prepaid mobile phone - Wikipedia

   en.wikipedia.org/wiki/Prepaid_mobile_phone

   Direct from some open-loop prepaid cards featuring a mobile refill service. Through electronic reloading where a specially designed SIM card is used to reload a mobile phone by entering the mobile number and choosing the amount to be loaded. This process is widely implemented in the Philippines and India so that any person can be a prepaid load ...

4. Unstructured Supplementary Service Data - Wikipedia

   en.wikipedia.org/wiki/Unstructured_Supplementary...

   The user submits a code corresponding to the service available. USSD can be used to provide independent calling services such as a callback service (to reduce phone charges while roaming), enhance mobile marketing capabilities or interactive data services. USSD is commonly used by prepaid GSM cellular phones to query the available balance.

5. 5 Best Prepaid Debit Cards of 2022 - AOL

   www.aol.com/finance/5-best-prepaid-debit-cards...

   Fees and Details. Card Purchase Fee. Free if bought online; up to $9.95 at retailers. Monthly Fee. Between $5 and $9.95 per month or $1.50 per transaction, depending on the plan

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. SIM lock - Wikipedia

   en.wikipedia.org/wiki/SIM_lock

   A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.