A carrier lock, which is featured on most cellphones, is a software code placed on a phone that prevents its use on another network. To unlock the technology, another code must be inserted on the phone. Devices that do not have the lock or code specifically advertise or state they are unlocked. Google, Android, Nexus and Apple feature unlocked devices.Know More
CNET further explains how locking and unlocking affects cellphone use. Typically, locked devices operate on the GSM network. Service for the phones is provisioned with an integrated circuit known as a Subscriber Identity Module, or SIM card. If the device is unlocked, the SIM card just needs to be removed and a new SIM card added by the new carrier. Companies such as T-Mobile and AT&T are part of the GSM network and offer this feature for their customers.
On a CDMA network, phones do not feature SIM cards. Therefore, the current carrier needs to be contacted to reprovision the technology. Carriers such as Sprint and Verizon Wireless are part of the CDMA network. However, neither of the carriers are willing to reprovision devices that are made to be used on the other's network. As a result, a Verizon phone cannot be reprovisioned for Sprint use and vice versa. A GSM phone offers more flexibility in this regard.
According to PC Magazine, CDMA is an acronym that stands for Code Division Multiple Access, while GSM is short for Global System for Mobiles. Both networks represent the two primary radio cellphone systems in the United States, as of 2014. Most of the United States operates on the CDMA network. However, worldwide, GSM is the preferred network for wireless technologies.Learn more about Mobile
As of 2014, some apps and websites that let the user text for free without a phone number include Kik, Fring, Meebo and WhatsApp. GroupMe is another option that works exclusively for texting groups of people, while iMessage is an option for Apple device users.Full Answer >
As long as the person is listed in the phone directory, it is possible to look up the address online, using the person's phone number. Some people choose not to be listed, so it's not possible to use their numbers to find their physical addresses.Full Answer >
There is no directory that currently lists cellphone numbers. There were rumors that a cellphone directory was being created.Full Answer >
To find out someone's cell phone number, a person can use Yellowbook or National Cellular Directory. To use the former, all one has to do is enter the first name, last name and state location of the person into the relevant search boxes.Full Answer >