CIS vs Regular SIM-Only Plans: Is It Worth Upgrading?

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Last updated: 16 September 2025

Written by: Circles.Life

4 minutes read

What is a Corporate Individual Scheme (CIS) SIM-Only Plan?

A SIM-only plan provides customers the flexibility to use a mobile network without being tied to a device contract, typically offering data, talk time, and text services while allowing users to provide their own device. A CIS plan is a special mobile plan available to employees of participating companies, where the company negotiates discounts with telcos as part of a Corporate Mobile Plan structure. These plans often come with lower mobile costs in exchange for a commitment, providing employees with cost-saving benefits through corporate deals.

Benefits of CIS SIM-Only Plans

  • Cost Savings: Employees can enjoy discounts on both their phone bills and devices, often bundled into a single plan.

  • Predictable Monthly Costs: Users have the benefit of a consistent monthly bill without the worry of fluctuating costs for devices or extra services.

  • Long-Term Value: CIS plans are ideal for those who intend to stay with their employer for a significant amount of time, offering them long-term mobile value.

Eligibility Criteria for CIS Plans

To qualify for a CIS plan, individuals must be employed by a company participating in a corporate scheme. Proof of employment (such as a staff ID or corporate email) is usually required. Some telcos may also have specific criteria such as minimum tenure at the company or job classification.

Which Telcos Offer CIS Plans in Singapore?

Several major telcos in Singapore offer CIS plans, including:

  • Singtel

  • StarHub

  • M1

These telcos provide unique benefits and discounts tailored for corporate customers, ensuring competitive mobile service options.

CIS SIM-Only Plans: Best Suited For

  • Consistent Monthly Bills: Employees who want a reliable and fixed monthly cost can benefit from the predictable nature of CIS plans.

  • Long-Term Users: Ideal for consumers who are planning long-term mobile usage with discounts on devices.

  • Corporate Perks Seekers: If you're employed at a company offering Corporate Lines benefits, a CIS plan will be an excellent fit.

What is a Regular SIM-Only Plan?

A regular SIM-only plan allows users to select from a variety of mobile services like data, talk time, and text while maintaining flexibility with no contracts for devices. It’s perfect for those who want freedom and prefer to bring their own device.

SIM-Only Plan Benefits

  • Flexibility: Choose the plan that best suits your data and call needs without a device commitment.

  • No Contract Obligations: Users are free from lengthy contract terms and can change plans as needed.

  • Cost-Effective: Often more affordable than contract plans, as users only pay for the mobile services they need.

Regular SIM-Only Plans: Best Suited For

  • Budget-Conscious Consumers: Those who are looking to save on mobile expenses and don't require a device upgrade.

  • Flexible Users: Ideal for those whose mobile usage may change frequently and prefer to adjust their plans without penalties.

  • Independence from Devices: Perfect for users who prefer buying their own device and upgrading it anytime.

CIS Plan vs Regular SIM-Only – Key Differences

Feature

CIS Plan

Regular SIM-Only Plan

Contract

Fixed for corporate employees

No contract commitment

Phone Included

Subsidized or discounted devices

No phone, bring your own

Monthly Cost

Lower monthly bill, bundled deals

Higher monthly bill for services

Flexibility

Less flexible, with commitment

Highly flexible, change anytime

Data & Call Value

Often includes more data or benefits

Varies, usually data-heavy

Early Termination

Penalties for leaving company

No penalties, no contract

Is the Device Subsidy Worth It?

While CIS plans may seem like a great deal due to device subsidies, it’s important to consider the real cost comparison. Sometimes, paying for a device upfront or getting a device on a regular plan could be cheaper than committing to a long-term contract with hidden penalties and potential lock-ins.

Regular Plan vs CIS Plan: Which One Should You Choose?

CIS plans provide excellent benefits for employees who plan to stay at their current job long-term and want to enjoy corporate discounts. On the other hand, regular SIM-only plans offer greater flexibility and no commitment to a device, making them ideal for consumers who prefer mobility and independence.

Criteria

CIS Plan

Regular SIM-Only Plan

Ideal For

Employees planning long-term stays with their current job

Consumers who prefer flexibility and independence

Device Commitment

Includes device subsidies and corporate discounts

No device commitment, bring your own device

Contract Commitment

Requires commitment, often tied to employment

No contract, flexible terms

Cost Structure

Lower monthly costs with bundled benefits

Pay only for services, no discounts or subsidies

Flexibility

Less flexible due to corporate requirements

High flexibility to change plans or providers anytime

Long-Term Savings

Great for long-term savings if staying with the company

Best for short-term users or those who don’t need a new device

Perks and Benefits

Corporate discounts, more data, and bundled services

Typically no perks, but lower overall cost for users with their own devices

Final Verdict: Is CIS Worth the Switch?

If you're employed at a company offering CIS plans, upgrading could be beneficial, especially if you want consistent monthly costs and device subsidies. These plans often come with corporate discounts, more data, and bundled deals, making them a great option for employees looking for long-term savings and stability. However, CIS plans require a commitment, so they are best suited for those planning to stay with their company for the long haul. If you prefer flexibility and independence, a regular SIM-only plan might be the better choice. These plans offer no long-term commitments, allowing you to adjust your plan or switch providers whenever needed. If you don’t mind purchasing your own device and want more freedom in your mobile usage, a regular plan gives you the flexibility to upgrade or change plans without being tied to a contract.

FAQs about CIS & Regular SIM-Only Plans

  1. Is a SIM-only plan better than a contract plan?
    Yes, SIM-only plans are often cheaper and more flexible, offering no commitment to devices.

  2. What is a CIS mobile plan?
    A CIS plan is a mobile plan offered to employees of participating companies with discounts and corporate benefits.

  3. Do CIS plans really save money?
    Yes, CIS plans offer savings on both devices and monthly bills, especially for long-term users.

  4. Are SIM-only plans cheaper in the long run?
    SIM-only plans tend to be cheaper for consumers who don’t require a new device every year.

  5. What happens if I leave my job with a CIS plan?
    If you leave your job, you may lose access to your CIS plan benefits and will have to switch to a regular plan.

ABOUT THE ARTICLE

Published 2025/06/30

Written by Circles.Life

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