How many mobile phone subscribers are there in the world?

A subscriber identity module or subscriber identification module (SIM) is an integrated circuitthat securely stores the international mobile subscriber identity (IMSI) and the related key used to identify and authenticate subscribers on mobiletelephony devices


A SIM card contains its unique serial number (ICCID), international mobile subscriber identity (IMSI), security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to and two passwords: a personal identification number (PIN) for ordinary use and a personal unblocking code (PUK) for PIN unlocking.

tough to know what you mean by biggest, but China Mobile has the most subscribers at over 700 million

For your Please check the link , and for better understanding about 3G Please read below, this should clear your concept about it.
3G or 3rd Generation, is a family of standards for mobile telecommunications. Services include wide-area wireless voice telephone, video calls, and wireless data, all in a mobile environment. Compared to 2G and 2.5G services, 3G allows simultaneous use of speech and data services and higher data rates (up to 14.0 Mbit/s on the downlink and 5.8 Mbit/s ). Thus, 3G networks enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency.

The bandwidth and location information available to 3G devices gives rise to applications not previously available to mobile phone users. Some of the applications are:
Mobile TV - a provider redirects a TV channel directly to the subscriber's phone where it can be watched.
Video on demand - a provider sends a movie to the subscriber's phone.
Video conferencing - subscribers can see as well as talk to each other.
Tele-medicine - a medical provider monitors or provides advice to the potentially isolated subscriber.
Location-based services - a provider sends localized weather or traffic conditions to the phone, or the phone allows the subscriber to find nearby businesses or friends.

Nokia 5230 XpressMusic support GPRS, EDGE and 3G but no Wi-Fi.

Thanks.

GSM stands for Global System for Mobile
Sim stands for Subscriber Identity Module

:)

Hello
You need to contact with mobile service provider to subscribe and install setting of internet in your mobile
Hope it will helps, do rate if so. Good Luck CMPTRLINK

yes you have to subscribe packet data first means first subscribe for mobile internet gprs service or mobile office.

GPRS: general packet radio service (that's the net in your mobile)
Your GPRS is not subscribed and it needs to be subscribed.

-- Call your service provide, and ask them to give you info of subscribing GPRS service.

As much as I know... Subscribing to GPRS is free, but the usage charge will be there.

Please inform if the problem is solved or not.

Hi buddy,
The packet data connection will available for u only when u have subscribed to the network for GPRS like airtel(Mobile office),Vodafone(Vodafone Live) etc. Then only ur problem will be solved.
1. For subscribing to the Mobile office of airtel n/w sms GPRSACT to 222, For settings sms MO to 52586.
2. for subscribing to the Vodafone live of Vodafone n/w sms ACT VL to 141.
I hope this will help u.

There is a site, specialized on manuals and provider specific network settings. Ask them.

A Subscriber Identity Module (SIM) on a removable SIM Card securely stores the service-subscriber key (IMSI) used to identify a subscriber on mobile telephony devices (such as computers and mobile phones). The SIM card allows users to change phones by simply removing the SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device.