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The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers. The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N) known as UN32 or UN-32, which consists of 45% ammonium nitrate , 35% urea and only 20% water.
Spectrum assets acquired by Verizon Wireless, service to any customers remaining on the network was shut off after February 28, 2015. [50] Cleartalk affiliate of Clear Talk Wireless: CDMA2000: EV-DO, LTE: Unknown: 2016: WGH Communications sold South Carolina licenses to T-Mobile US and exited the business ClearTalk Wireless Flat Wireless ...
USSD (Unstructured Supplementary Service Data) codes [1] are mobile dial codes that can be used for communicating with the service provider's computers (i.e. for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network).
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.
A mobile network operator typically also has the necessary provisioning, billing, and customer care computer systems, and the marketing, customer care, and engineering organizations needed to sell, deliver, and bill for services. However, a mobile network operator can outsource any of these systems or functions and still be considered a mobile ...
This is a highly competitive industry that includes telephone, cable, and data services segments. [3] Products and services include: Mobile networks like GSM (Global System for Mobile Communication), Enhanced Data Rates for GSM Evolution (EDGE) or GPRS (General Packet Radio Service). Networks of this kind are typically also known as 2G and 2.5G ...
ETSI and 3rd Generation Partnership Project (3GPP) standards, such as GSM and LTE, define supplementary service codes that make it possible to query and set certain service parameters (e.g., call forwarding) directly from mobile devices.
Mobile number portability (MNP) is a service that makes it possible for subscribers to keep their existing mobile phone number when changing the service provider (or mobile operator). With number portability now in place in many countries, LCR providers can no longer rely on using only a portion of the dialed telephone number to route a call.