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Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM -based CDMA devices, the PRL resides on the R-UIM .
An international roaming outage is leaving customers of the three major US mobile carriers in the dark, making it difficult or impossible for American customers who are currently out of the ...
In statements to Reuters, Verizon, AT&T and T-Mobile US said they were working to resolve the issue but did not provide details on the extent of the outage or the services partner responsible for it.
At 8 p.m. Verizon told CBS MoneyWatch that its engineers had fully restored the network after a "disruption that impacted some customers." "Service has returned to normal levels," the spokesperson ...
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The HLR will send to the VLR a MAP PRN (Provide Roaming Number) message to obtain the MSRN of the roaming cell phone. Like that the HLR will be able to route the call to the correct MSC. With the IMSI contained in the MAP PRN message, the VLR assigns a temporary number known as the mobile station roaming number (MSRN) to the roaming cell phone.
mobi acquired wireless spectrum in the PCS band in 2004 [11] and launched service [12] covering Hawaiʻi in 2005. Doing business as mobiPCS, the company and MetroPCS were both backed by venture capital firm M/C Partners, with each disrupting the market in their respective regions by offering no contract, no credit check, unlimited wireless service before those became widespread options in the ...