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This is in contrast to a phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions. Generally phones can be locked to accept only SIM cards with certain International Mobile Subscriber Identities (IMSIs); IMSIs may be restricted by: Mobile country code (MCC; e.g., will only work with SIM issued in one country)
The SIM Registration Act, officially designated as Republic Act No. 11934 and commonly referred to as the SIM card law, is a Philippine law mandating the registration of SIM cards before activation. Under the measure, mobile device users must register their SIM cards, whether prepaid or postpaid. The law was enacted intending to curb ...
Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1] A notable exception is that emergency calls to 000, 112, 911, 999 and the like are exempt. [2]
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).
GSM: (SIM unlock) globe smart sun Alltel or Verizon Wireless do not use any type of subsidy locks on their CDMA phones. Default Code:000000 or 123456 or 654321 Prepaid cellphones from Alltel & Verizon Wireless come locked from the store, but Verizon Wireless prepaid cellphones can be unlocked with a call to Verizon.
If the wrong PIN is entered more than three times, the SIM card will become locked. It can be unlocked by entering the PUK code provided by the mobile service provider, [1] which may be available on the SIM card's packaging, the contract, or provided by customer service after identity verification. After the PUK code is entered, the PIN must be ...
If the phone/tablet was purchased in any of these countries and the SIM card is from a different region, they cannot be used together. Although the restriction can be removed after using a local SIM card to make a call for at least 5 minutes, it only removes the restrictions for that particular country.
The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM , UMTS , LTE , 5G NR , iDEN , Iridium or other IMEI-employing wireless ...