Learning Center
What is GSM?
Nerd Answer: Global System for Mobile Communication. Originally developed as a pan-European standard for digital mobile telephony, GSM has become the world’s most widely used mobile system. It is used on the 850 Mhz, 900 MHz, 1800 MHz and the 1900 Mhz frequencies.
What are GSM Bands 900/1800/1900?
Nerd Answer: GSM technology can work on up to 4 frequencies: 850 Mhz, 900 Mhz, 1800 Mhz, and 1900 Mhz.
Some GSM phones support all the bands or frequencies, or just a couple. A dual band phone
supports only two, usually 900/1900 or 850/1900. A tri-band phone supports three bands,
either 850/1800/1900 or 900/1800/1900. A quad-band phone supports all GSM bands.
Quad-band phones are able to work with any and all GSM service providers.
On the other hand, GSM service providers support just a subset of
all the GSM bands available. Before buying a GSM phone, make sure the
phone supports at least one of the bands that your GSM service provider supports.
What is a sim card?
Nerd Answer: A sim card is a small flat rectangle plastic that contains a microchip.
This microchips is the heart of your phone, it contains your phone number,
your address book, and the necessary information for your phone to work. All
sim cards look the same, but the microchip inside is different for every GSM
service provider.
My GSM service provider does not have sim cards, why?
Nerd Answer: If your service provider does not have sim cards, then it does not use GSM technology.
Our phones will not work with non-GSM service providers.
What is Unlocked?
Nerd Answer: An unlocked phone is a phone that can work with any sim card and/or GSM service provider.
What is a GSM Service Provider?
Nerd Answer: A GSM service provider (carrier) is a company providing you with a working line and
phone number. To do this, they will provide you with a sim card.
What is Bluetooth?
Nerd Answer: Bluetooth is an industry specification that describes how mobile phones, computers and
PDAs can easily interconnect with each other and with home and business phones
and computers using a short wireless connection.
OEM Accessories vs. Aftermarket
Nerd Answer: OEM (original equipment manufactured) Accessories are the accessories made by cell phone and PDA
manufacturers. An important point many people are unaware of is the fact that
OEM Accessories are mandated by international standards as part of the qualifications for ISO certifications.
In most cases, if not all, the use of Aftermarket Accessories voids the manufacturer's warranty.
What is GPRS?
Nerd Answer: General Packet Radio Service (GPRS) is a mobile data service available to users of GSM mobile phones.
It is often described as "2.5G", that is, a technology between the second (2G) and third (3G) generations
of mobile telephony. It provides moderate speed data transfer, by using unused TDMA channels in the GSM network.
What is 3G ?
Nerd Answer: 3G is the third generation of mobile phone standards and technology, superseding 2.5G.3G technologies enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency. 3G is faster and currently the fastest data service available to cellular users.
