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The phones do not seem to have any sort of SIM network lock and have been successfully used with Orange, Vodafone and O2. In Canada and the United States, this phone was not available through Motorola's normal retail channels. Where available, the North American version was normally sold unlocked, with no SIM card.
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.
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.
The G4 was available in black and white-colored versions, with different rear-cover and accent-colors available for custom order via MotoMaker. The G4 has a removable back cover which exposes SIM card slots and a MicroSD card slot. The G4 includes a 5.5-inch 1080p display, an octa-core Qualcomm Snapdragon 617 system-on-chip, and 2/3 GB of RAM.
The first SIM card was made in 1991 by Munich smart card maker Giesecke & Devrient for the Finnish wireless network operator Radiolinja. [citation needed] A hybrid mobile phone can hold up to four SIM cards, with a phone having a different device identifier for each SIM Card. SIM and R-UIM cards may be mixed together to allow both GSM and CDMA ...
It was the first CDMA version of the Razr without expandable memory, Bluetooth, and SIM card, since Motorola Korea's system was able to produce its own model before worldwide GSM format release. It had a 1.3-megapixel camera, video recording, 80 MB of internal memory, and a variety of UI features, such as a mobile blog, Yoga graphic book, diet ...
The SIM securely stores the service-subscriber key (IMSI) used to identify a subscriber on mobile telephony devices (such as mobile phones and computers). The SIM card allows users to change phones by simply removing the SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device.
Internally, Motorola developed a SIM card which when inserted would place the device in a service mode, allowing a technician to change parameters on the handset itself including the lock status. This card was never released to the general public although there are a small number of them in private hands.