USSD (Unstructured Supplementary Service Data) is a protocol used by GSM cellular networks to communicate with service providers. It allows for menu-based, two-way communication between a mobile device and application servers via short text messages of up to 182 characters. USSD sessions remain open, allowing for faster interactions than SMS. Some advantages of USSD include not requiring specific hardware or software, providing more user interactions through menus, and allowing services to work while roaming without additional charges. Examples of USSD services include balance checks, recharges, surveys, and social media access.

1. Prepared By: Rahul Karakoti
CSE 6thsem
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2.  What is USSD?
 How it works?
 Advantages of USSD.
 Examples of USSD.
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3.  USSD stands for “Unstructured Supplementary Service data”.
 It is a protocol used by GSM cellular telephone to communication with the
service provider’s computer.
 It can be used for menu based information service.
 USSD messages are up to 182 alphanumeric characters in length.
 Similar to SMS, but USSD transactions occur during the session only.
 What is USSD ?
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4. Example Snapshot:
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5.  It is a GSM technology used to send text between a mobile & apps in the
network.
 Enables session based communication between application server at the
network side and the mobile user.
 USSD information is sent directly from a sender’s mobile handset to an
application platform handling the USSD service.
 The connection remains open, allowing a two-way exchange of a sequence
of data.
 How USSD works ?
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6.  Unlike major challenge for most VAS services, USSD has no dependency
on handset & OS types.
 Easy to navigate, no need to remember any keywords, URLs, etc.
 Real-time and instant messaging service capability - up to seven times
faster than SMS for two-way transactions.
 Supports menu-based applications facilitating more user interactions.
 USSD services available on the home network are also accessible while
roaming. Unlike SMS, there are no charges for this.
 Advantages of USSD
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7.  VAS services via USSD
(Balance check , service activation etc.)
 Examples of USSD Services
 Market research surveys on USSD.
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8.  Social Media access over USSD.
 Services over USSD
(recharge, money Transfer etc.)
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