Top 20 FAQs About SIM-Only Plans in Singapore (Answered)

SIM-only plans have become one of the most popular mobile plan choices in Singapore. With competitive pricing, flexible data options, and no handset lock-ins, they appeal to students, working professionals, families, and even frequent travellers.

If you’re considering switching, here’s a complete guide answering the top 20 most asked questions about SIM-only plans in Singapore, covering pricing, 5G, contracts, roaming, and whether a SIM-only plan is really worth it.

What is a SIM-only plan?

A SIM-only plan is a mobile plan that provides calls, SMS, and mobile data without a phone bundle. You keep your existing phone and pay a monthly fee purely for connectivity.

Because there’s no handset subsidy, SIM-only plans are usually cheaper than traditional mobile plans.

Which is the best SIM-only plan in Singapore?

The best SIM-only plan depends on how you use your phone. Heavy data users may prioritize high data caps or 5G access, while others may value affordability or roaming perks.

Many Singaporeans look for plans that balance:

• Large monthly data

• Reliable local coverage

• Optional roaming add-ons

• No long-term contracts

Which is the cheapest SIM-only plan in Singapore?

The cheapest SIM-only plans in Singapore typically offer:

• Lower monthly data

• Limited extras

• No device bundles

These plans are ideal for light users who mainly rely on Wi-Fi and use mobile data sparingly.

Which is the best 5G SIM-only plan in Singapore?

The best 5G SIM-only plan offers:

• Access to Singapore’s 5G networks

• Sufficient data to support higher speeds

• Stable performance across supported areas

Most telcos now include 5G as an optional or standard feature on selected SIM-only plans.

What are the best postpaid SIM-only plans?

Postpaid SIM-only plans bill you monthly and often include:

• Higher data allowances

• Better roaming options

• Add-ons for international calls or data

They are suitable for users who want predictable monthly billing without prepaid top-ups.

What is a data-only SIM plan and who should use it?

A data-only SIM plan provides mobile data without calls or SMS. These plans are commonly used for:

• Tablets

• Mobile hotspots

• Secondary devices

• Backup internet access

They’re ideal for users who don’t need voice services.

Are SIM-only plans better than prepaid plans?

SIM-only plans are often better for users who:

• Want consistent monthly data

• Prefer automatic billing

• Use mobile data regularly

Prepaid plans may suit short-term users or those who want strict spending control.

What are the key benefits of a SIM-only plan?

Key benefits include:

• Lower monthly cost

• No device lock-in

• Flexible data options

• Easier telco switching

• Better value for long-term use

Do SIM-only plans have contracts?

Many SIM-only plans are contract-free, though some offer optional 12-month contracts for additional perks. Always check whether early termination fees apply.

Can I switch telcos easily with a SIM-only plan?

Yes. SIM-only plans make switching telcos easier since there’s no handset contract involved. Mobile number portability allows you to keep your existing number.

Do SIM-only plans support international roaming and IDD?

Most SIM-only plans support:

• International roaming

• IDD calls

• Data roaming add-ons

Availability and pricing vary depending on the telco.

Can I use my SIM-only plan abroad?

Yes. You can use your SIM-only plan overseas by activating roaming or purchasing roaming add-ons before travel.

Some plans also allow eSIM-based roaming options for convenience.

Can I get 5G coverage with a SIM-only plan?

Yes. Many SIM-only plans in Singapore offer 5G access, provided:

• Your device supports 5G

• You’re within a 5G coverage area

• Your plan includes 5G services

What if I run out of data on my SIM-only plan?

If you run out of data, you can usually:

• Purchase data add-ons

• Upgrade your plan

• Continue usage at reduced speeds, depending on the telco

Can I keep my number with a SIM-only plan?

Yes. You can keep your existing number when switching to a SIM-only plan through number porting.

Is a SIM-only plan worth it?

For most users, a SIM-only plan is worth it if you:

• Already own a phone

• Want to reduce monthly costs
  Prefer flexibility over bundled contracts

What are the top telcos offering SIM-only plans in Singapore?

Singapore has several telcos offering SIM-only plans, including:

• Major network operators

• Digital-first telcos

• MVNOs offering competitive pricing

Each differs in data caps, 5G access, and roaming options.

Can I switch to a SIM-only plan if I’m in a contract?

Yes, but you may need to:

• Complete your existing contract

• Pay an early termination fee

• Switch after your contract ends

What are the disadvantages of SIM-only plans?

Potential drawbacks include:

• No phone subsidy

• Less suitable for users needing a new device

• Some low-cost plans may have fewer perks

What are the types of SIM-only plans?

Common types include:

• Postpaid SIM-only plans

• Contract-free SIM-only plans

• 5G SIM-only plans

• Data-only SIM plans

• SIM-only plans with roaming add-ons

Final thoughts

SIM-only plans offer flexibility, affordability, and strong value for most mobile users in Singapore. Whether you’re looking for the cheapest SIM-only plan, the best 5G option, or a data-only SIM plan, understanding how these plans work helps you choose the right one for your needs.

Before switching, compare data usage, roaming needs, and contract terms to ensure the plan fits your lifestyle.