GSM Glossary

Balance
Balance is an amount of money remaining on the subscriber’s account.

Billing system
Billing system – is a system through which all the cash flow operations are done.

Guarantee deposit
The subscriber is required to submit a deposit as security for payment of charges. An additional deposit may be required if either the amount of Services is increased or the credit rating changes.

Deposit Roaming
In case the customer wants to subscribe on the international roaming, he/she has to submit a deposit as security for payment of charges for services provided by the networks abroad. 

ICCID
ICCID (Integrated Circuit Card Identity) 19 or 20-digit number of the SIM Card

Monthly fee

Monthly fee is a fixed amount paid to the Service Provider (Viva-MTS) on the monthly basis, for the telecommunication services.

PIN 2

PIN 2 The PIN code 2 are delivered with the new SIM cards. This code controls access to some of the more advanced features of the phone. The default code is set by the Service Provider, but the subscribers are able to change this code

PIN code

PIN code (Personal Identification Number) is used for the SIM security and the default one is 0000, after entering the PIN codes wrong 3 times the account will be blocked, to unlock account enter the PUK code.
To change the PIN code, please  refer to the manual guide of his/her handset   

PUK code

PUK code (Personal Unblocking Key ) entering the PUK code 10 times incorrectly will completely damage the SIM card, to recover his/her line subscriber has to visit VIVA Service Center.

PUK2

This performs the same function as the PUK, but for SIM PIN 2. You should ask your Service Provider for this code when you need it

SIM card

SIM card  is actually a tiny computer inserted into the mobile phone. It has a memory (for data and applications), a processor and the ability to interact with the user.  The SIM card identifies subscribers to the network and contains a microprocessor chip, which stores unique information about the account, including the phone number, it also stores information about the services that are available to the client as a local subscriber. The SIM card, provided by a local GSM cell phone operator, snaps into the back of a GSM cell phone to make you a local subscriber. The subscribers are not phone dependent, all you need is your own SIM card and almost any GSM phone.

Subscriber’s account

Subscriber’s Account can be defined as a kind of “bank account” established with the billing system of Viva-MTS, all subscriber’s transactions (cash flows) are done through it.

Unbilled amount

Unbilled amount is the amount of airtime in AMD (USD) used by the subscriber, from the beginning of each billing period (usually from the 1st of each month) .