Founded by IT and Telco Professionals focusing on High Value Added Solutions. Company’s Experts have more than 20 Years of Experience by facilitating disruptive Innovations in the Intersection between IT and Telecommunications. 



Customers rely on ADDENDUM for:

B2C and B2B Service Implementation

Business Consulting

BSS/OSS Development & Support

Enterprise Application Services

Business Process Management

Human Resource Outsourcing

Quality Assurance

Project Management

CRM Implementation

Every Project gives Us EXPERIENCE, every Business Meeting – NEW INSIGHTS, every Lunch Break – IDEAS.
Today We are better than We were Yesterday, so come see Us Tomorrow!

Telia (former Omnitel), a member of Telia Company (former TeliaSonera) group, is one of the largest telecommunication companies in the Baltic states—Estonia, Latvia, Lithuania.


Telia together with 17 other Telia Company's brands united under a new brand identity. New brand identity reflects the combination of the company’s international strength and strong local connection.
Addendum Solutions took part at internal Telia rebranding project and was responsible for brand changes in various internal Telia systems. 
Our QA representative worked as a test manager and was responsible for external rebranding launch overnight. 

More information about Telia


Telia first to launch commercial 4G network in Lithuania


Telia was first among mobile telecommunication companies that offer to its users fourth-generation 4G LTE mobile internet technology in Lithuania.
Addendum Solutions made changes in Telia internal systems and implemented 4G service provisioning.

Find out more about 4G technology on:

More information about Telia


Addendum Solutions successfully implemented CRM at DPD Lithuania "from zero to hero"


DPD is a leading provider of standard and express parcel services. Project lasted for 5 months and was split into five phases:

Business process analysis and documentation;

System selection according Customer’s business process;

System implementation and configuration;

Training for internal users and

Trial operation of the system - stabilization.

CRM system was implemented and integrated with other DPD Lithuania local systems to manage relationships with customers more effectively and ensure data consistency across the company.

More information about DPD Lithuania


Mobile Parking Fee Application for BlackBerry Users in Lithuania


Customers with BlackBerry® smartphones can now conveniently pay for car parking using the mobile application in Lithuania. Application is available for Customers of all  mobile telecommunication providers: Telia (former Omnitel), Bite and Tele2.

Paying for parking by mobile phone has always been one of the most popular additional services to our customers. The rapidly growing numbers of smart phones among Omnitel users taken into account the need, and have already proposed a payment application for Android, iOS and Symbian operating systems. In spring we have supplemented the choice of smart phones with BlackBerry® phones, we arranged the possibility of more convenient way paying for parking which could be available for BlackBerry® phone owners
— Darius Maikstenas, Omnitel Vice President for Marketing and Services

Application is developed by Addendum Solutions - the only certified BlackBerry® software development professionals in the Baltic States. 

Download Parking app for your BlackBerry from BlackBerry App World:

More info about Telia

More info about Bite

More info about Tele2


Telia Wi-Fi enables it's mobile customers to quickly and conveniently connect to the Internet through 3000 Telia Wireless access points in Lithuania.

Addendum Solutions developed integrations between Telia (former Omnitel and TEO) systems and implemented changes to create such a possibility for Telia clients.

More information about Telia