Test Case For Telecom Billing System

Test Case For Telecom Billing System Or Telecom Billing Testing Scenarios: This post is based on a request from a reader regarding the test cases for the telecom billing system asked in the interview. Considering the telecom companies in the IT sector, this post will help freshers understand how to write test cases for such an application. 

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What is a telecom billing system?

In the simplest terms, A telecom billing system is a set of policies, processes, and data that a service provider uses to determine how much you owe them.

In the market, there are few telecommunications billing software are there, and those are mostly used in various companies. Here are some examples of telecommunications billing software: Zoho Invoice, TallyPrime, FreshBooks, Uprow ERP, and many more are there.

What is Telecommunications?

The telecom billing system is quite complex, and each operator maintains a different system for customer records. I had a chance to check out Vodafone and BSNL billing systems, and I observed the software’s workflow. So, using that workflow, I will write some sample test cases for the billing system.

Customer service centers have three different modes of payment systems – Self-service kiosks, Cash transactions on a counter, and card transactions. Each of these payment methods will change the structure of the billing system. For the sake of simplicity, let’s assume we are using the cash transaction on the service counter.

A customer service staff member will take your phone number and bill amount here. He/She will add your number to the billing system and generate customer records. This record system has the option to see the current bill, past paid and unpaid bills, mode of previous transactions (cash or card), late fee checkbox, service request option, and statements. It also generates the print after the successful payment from the client. The telecom billing testing scenarios then update the core server to change the bill status from unpaid to paid.

Check out these old telecommunications billing systems used before GUI-based software. Due to the simplicity of the old systems, there was less room for error when choosing the menu options. However, the errors were introduced as external libraries offered no input validations to developers.

Test Cases For Billing System

  • Check the customer’s telephone number and see if it exists as a current customer under the telecom operator.
  • Check if the number is working or not.
  • Check if the number entered is a valid 10-digit number.
  • Check if the number is not blocked due to reasons.
  • Check if the number has an active billing cycle.
  • Check if the number has an unpaid billing history. If it exists, it is shown on the screen.
  • Check if the number’s previous billing amount is paid.
  • Check if the system allows statement generation as per customer requirements.
  • Check if the system has recorded several calls accurately.
  • Check if the plan selected by the customer is reflected in the billing system.
  • Check if the plan upgraded is selected by customer data in the system.
  • Check if the plan downgraded is selected by the billing system.
  • Check if the value-added services are enabled or disabled.
  • Check if the total amount is accurate and mapped to the services offered.
  • Check if the tariff plan is properly calculated for the billing cycle.
  • Check if the number of calls is valid by matching them to customer records.
  • Check if the prepay system has accepted additional money for future billing.
  • Verify if the prepay balance is used in the current billing.
  • Verify if the floating-point balance is carried forward into the next bill.
  • Verify if the customer pays the bill, and it reflects in the system.
  • Verify if the customer has chosen a card or cash transaction.
  • Verify if the card transaction has been successful in the payment terminal.


These are common test cases for the telecom domain regardless of the operator. The test cases will increase once you get your hands on the system workflow of the telecom billing system. The option for a service kiosk and card payment will increase the number of test cases you must cover. Each field will have its validation check. Depending on whether it is a web-based or VB-based application, you’ll find the validation checks different in each application.

Now, you can format your telecom billing testing scenarios documents using these fields – test case ID, description, test data, expected result, actual result, pass or fail remark, and bug description. This should help you form a test case document for verifying the manual testing defects in the application.

I hope you have found this post useful for your manual testing practices. Feel free to let me know if you find these posts helpful. I’ll help you with more test cases in the future.

I love open-source technologies and am very passionate about software development. I like to share my knowledge with others, especially on technology that's why I have given all the examples as simple as possible to understand for beginners. All the code posted on my blog is developed, compiled, and tested in my development environment. If you find any mistakes or bugs, Please drop an email to softwaretestingo.com@gmail.com, or You can join me on Linkedin.

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