myNET

myNET application purpose is help user to save money by let customer know the called phone number that belongs to which network operator so they can select in-net calling instead of off-net calling.

In Vietnam, in-net network calling fee (calling between subscribers belong to the same network operator) is much more cheaper than off-net phone fee (calling between subscribers belong to differnent network operators).
In case subscribers have many phone numbers - usually belong to different network operators (such as subscriber using multiple SIMs or subscriber using multiple phones), they require to know the called party whose phone number belongs to which network operator. So that they can use their phone number to make an in-net calling instead of off-net calling to save money.

In case subscribers who use only 01 phone number, he care about the calling fee. When call to an in-net party, some of them make long period phone calls without hesitation. But when call to an off-net party, they try to talk shortly as possible to save money.

In the past, Vietnamese people could recognize a phone number that belongs to one network operator by its prefix (eg Viettel is 098xxx, Vinaphone is 091xxx).
However, now aday Mobile Network Portability policy (MNP - one person has permission to keep his phone number when change from original network operator to another network operator) has been taken effect, so it is impossible to judge a phone number that belongs to which network operator by its prefix.

myNET application purpose is to assist user in identifying the network operator name that associated with a phone number (in phone book) at the current time.
To maximize convenience for users, the application accesses the phone's contacts directly, then display and allow user make a phone call by selecting the one whom he want to call by only one touch action on a single screen.
In addition, the application displays the network operator name associated with the phone number anywhere (such as the recent call screen) to make convenient use when user want to make a phone call quickly as possible.

The application purpose is only to assist in identifying the phone numbers that belong to network operator to save money, so it is designed in the form of phone book design to make convenient use.
myNET lacks of basic functions compared to the existing contacts application (such as Phone app on Iphone) to manage contact (such as contact creation function, receive call etc.), so it is not intended to be a replacement.
myNET application in this case is like an add-on to the existing contact application. Therefore, myNET should be used in tandem with the existing contact (phonebook) application.