What is OEM?
The term, OEM (original equipment manufacturer) refers to companies that make products for others to repackage and sell. More…  Resellers buy OEM products in bulk, minus the costly retail packaging that comes with individually sold units. The product itself is essentially the same as its more expensive, retail-packaged sibling. OEM products are used in many industries, but are perhaps most prevalent in electronics.  

 Generally, dealers of OEM products add something of #118alue before reselling the merchandise. An OEM vendor that does this is known as a "#118alue added reseller" (VAR). A VAR might build components, sub-systems, or systems from quality OEM parts. OEM goods allow VARs a wide range of creative marketing choices, which permits smaller dealers to be competitive in the marketplace.
OEM products can be utilized at several different levels of industry. For example, assume a fictitious company, "Head Music," makes popular sound cards, and wants to introduce a DVD player to the marketplace. Not making DVD players themselves, they enter into a contract with Sony to supply OEM DVD players to them. Head Music receives the Sony-manufactured DVD players in bulk, affixes their own logo to the players, bundles them with their sound cards, and they are repackaged as "Head Music DVD and Sound Card."
Taking this basic concept a step further, assume that a local Mom and Pop VAR wants to use Head Music's DVD package in PC clone systems they are building. They contact Head Music and enter into a contract to buy the DVD/sound card combo in bulk, or OEM. They will be shipped to the VAR minus the expensive retail packaging, at a substantial savings. The VAR will install the packages in their PC clones, along with other OEM products, from motherboards to CPUs and hard drives. Even the operating system will be OEM, for example, from Microsoft. When the VAR is finished they can offer a PC clone with brand name components and software at a competitive price.
OEM software will have different product numbers than retail packages, and support may be provided by the VAR, rather than the maker of the software. Functionally, OEM and retail versions of software should be essentially the same.
OEM hardware can be purchased directly by the public at a savings of up to 30%. Hard drives are typical OEM items, purchased in an anti-static wrapper without box, cables and often without drivers or a manual. The warranty is generally the same, and drivers, manual and support are available online, when not provided with the product itself.
Some OEM products, however, do have shorter warranties. This is true of many CPUs where the retail version carries a three-year warranty, and the OEM version, one year or less. Check any OEM product you are considering for support and warranty details.
OEM goods are a great
#118alue for the consumer and are environmentally friendlier than waste-producing retail packaging. However, for those new to technology, retail packaging will supply everything you need for the product, often including a toll-free number for support. Meanwhile, over-the-counter OEM products might be better suited to those who are at least minimally computer savvy.
What is Dual SIM?
A dual SIM mobile phone is one which has two Subscriber Identity Modules (SIMs). More… Dual-SIM adapters are available to allow cellphones to contain two SIMs, and to switch from one to the other as required. Some phones are designed to work with two SIMs, both of which may be active at the same time.
Dual-SIM operation allows the use of two services without the need to carry two phones at the same time. For example, the same handset can be used for business and private use with separate numbers and bills; or for travel, with an additional SIM for the country visited.
What is Dual SIM phones
Mobile phones with simultaneous dual SIM capability built in have the advantage that there are no possible legal issues, breach of contract, or voiding of warranty. More … They allow both SIMs to be active simultaneously and allow calls to be received on either number, unlike adapters that make one or other number active as required.
Normal GSM phones contain a single transceiver; dual-SIM phones must have dual transceivers, and need to display signal strength for both networks. A phone with a single transceiver cannot be converted to simultaneous dual-SIM operation; at most it can be made switchable with the use of an adapter.
Although battery life (talk time and standby time) of dual-SIM phones is reduced, typically by about a third, when both SIMs are active, to compensate this they often came with better capacity batteries, or in the case of Chinese-made phones, bundle their units with two batteries, compared to single-SIM phones.
As of Autumn 2007 some little-known Chinese companies supply inexpensive dual-SIM mobiles, mainly in Asian countries. The latest model includes an iPhone look alike which is the smallest dual-SIM phone ever built. Philips has made models Xenium 9@9w and 699 with this capability belonging to the restart to change active-line generation. Samsung also released the D880 DuoS in November 2007, a slider which can hold two SIM cards with simultaneous standby and the D780 which came much later, and there is a Windows Mobile based dual-sim phone too, called E-TEN glofiish DX900 (released in November 2008, been renamed to Acer Tempo DX900 in January 2009, after Acer bought E-TEN).
GSM
What is GSM?
GSM (Global System for Mobile communications) is an open, digital cellular technology used for transmitting mobile voice and data services.
What does GSM offer?
GSM supports voice calls and data transfer speeds of up to 9.6 kbit/s, together with the transmission of SMS more … (Short Message Service).
GSM operates in the 900MHz and 1.8GHz bands in Europe and the 1.9GHz and 850MHz bands in the US. The 850MHz band is also used for GSM and 3G in Australia, Canada and many South American countries. By having harmonised spectrum across most of the globe, GSM’s international roaming capability allows users to access the same services when travelling abroad as at home. This gives consumers seamless and same number connectivity in more than 218 countries.
Terrestrial GSM networks now cover more than 80% of the world’s population. GSM satellite roaming has also extended service access to areas where terrestrial coverage is not available.
What is 3G/WCDMA ?
Developed by the global GSM community as its chosen path for 3G evolution more…, WCDMA is the air interface for one of the International Telecommunications Union's (ITU's) family of third-generation mobile communications systems.
3G/WCDMA (Third Generation / Wideband Code Division Multiple Access) enables the continued support of voice, text and MMS services in addition to richer mobile multimedia services such as
#8226; Music
#8226; TV and video
#8226; Entertainment content
#8226; Internet access
UMTS offers data speeds up to 384kb/s along with voice services.
#8226; 
#8226; GPRS
#8226; EDGE
#8226; 3G/WCDMA
#8226; HSPA
#8226; LTE
#8226; Services
#8226; GSM Roaming
#8226; Download Documents
GPRS
GPRS (General Packet Radio Service) is a very widely deployed wireless data service, available now with most GSM networks.
GPRS offers throughput rates of up to 40 kbit/s, so that users have a similar access speed to a dial-up modem, but with the convenience of being able to connect from almost anywhere.
GPRS customers enjoy advanced, feature-rich data services such as e-mail on the move, multimedia messages and location-based services.
What is EDGE?
Further enhancements to GSM networks are provided by Enhanced Data rates for GSM Evolution (EDGE) technology, which provides up to three times the data capacity of GPRS.
Using EDGE, operators can handle three times more subscribers than GPRS, triple their data rate per subscriber, or add extra capacity to their voice communications.
EDGE allows the delivery of advanced mobile services such as the downloading of video and music clips, multimedia messaging, high-speed Internet access and e-mail on the move.
Simple upgrade
EDGE uses the same structure, as today's GSM networks, which allows it to be overlaid directly onto an existing GSM network. For many existing GSM/GPRS networks, EDGE is a simple software-upgrade.
Due to the very small incremental cost of including EDGE capability in GSM network deployment, virtually all new GSM infrastructure deployments are also EDGE capable and nearly all new mid- to high-level GSM devices also include EDGE radio technology.  
HSPA
Standardised by 3GPP, HSPA is the set of technologies that defines the migration path for 3G/WCDMA operators worldwide. HSPA, which uses the FDD transmission scheme, includes HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access) and HSPA Evolved. These are also known as 3GPP Releases 5 through to 8.
Unlike many other mobile broadband technologies, HSPA provides very efficient voice services in combination with mobile broadband data.
In most HSPA networks, the end-user can expect to enjoy speeds of at least 1Mbps upwards, depending upon the peak speed of the network (anywhere from 1.8Mbps to 14.4 Mbps) with peak uplink speeds of up to 5.7Mbps.
HSPA Evolved
HSPA Evolved introduces MIMO (Multiple-Input, Multiple-Output) capabilities and higher order modulation (64QAM), enabling greater throughput speeds and higher performance. The first HSPA Evolved services are expected to be deployed at the end of 2008.
For more information on HSPA, network deployments, devices and case studies and white papers, please visit www.gsmworld.com/HSPA.
Outsourcing is subcontracting a process, such as product design or manufacturing, to a third-party company.[1] The decision to outsource is often made in the interest of lowering cost or making better use of time and energy costs, redirecting or conserving energy directed at the competencies of a particular business, or to make more efficient use of land, labor, capital, (information) technology and resources[citation needed]. Outsourcing became part of the business lexicon during the 1980s. It is essentially a division of labour.

 

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