Editor's Pick: Best SIM-only phone plans September 2025

Contents

In this guide:

Best SIM-only plan: Cheapest
Best SIM-only plan: Everyday use
Best SIM-only plan: Heavy use
Best SIM-only plan: Prepaid
Best SIM-only plan: International calls

Gone are the days when the mobile market was dominated by the three major telcos (Singtel, StarHub, and M1). Over the years, the market has seen a number of mobile virtual network operators (MVNOs) who’ve managed to offer similar inclusions at a very comparable price range.

SIM-only plans are a great choice for the person who’s happy with their current handset or equally willing to buy their next smartphone outright. Compared to big providers, there tend to be more SIM-only plans on offer from MVNOs. And that greater range of plans leads to a great mix of competitive pricing, deals and discounts, and tight competition on the all-important data front.

Moreover, there are providers that offer capped speeds if you go over your monthly data allocation so no bill shock. Scroll on to check our top picks of the best SIM-only plans this month.

Best SIM-only plan Singapore: Cheapest

Editor's Pick

Double Eight SIM Only

388GB data
on StarHub network
588 Minutes
88 Messages

Min. cost $8

What we love: This month, Eight stands out as our top budget SIM pick, offering an incredibly generous package that’s perfect for both local use and frequent travel.

Also consider the following:

#1	MyRepublic	MyRepublic 4G Essential 288GB data on M1 4G network 200 Minutes 100 Messages Deal: New sign up: $6/mth for first 6 mths, thereafter $9.90/mth $6/mth Min. cost $6 Go	$6/mth Min. cost $6	Go
#2	Zero1	Zero1 Starter Prime 4G 200GB data on Singtel's 4G network 300 Minutes 100 Messages Deal: 5G included for 3 months + Roam Malaysia 100GB for 365 days + Enjoy your 3rd month free $7.06 Min. cost $7.06 Go	$7.06 Min. cost $7.06	Go
#3	CMLink	CMLink 200GB 4G SIM Only 200GB data on Singtel's 4G network 300 Minutes 100 Messages Deal: 100GB Malaysia roaming for 365 days + enjoy a 5G trial when you port in. $7.70 Min. cost $7.70 Go	$7.70 Min. cost $7.70	Go
#4	VIVIFI	VIVIFI Roam Value 4G 200GB data on Singtel's 4G network 300 Minutes 100 Messages Deal: Port In Bonus: Free 5G Trial for 3 months (non-Singtel port in) $7.70 Min. cost $7.70 Go	$7.70 Min. cost $7.70	Go
#5	ZYM Mobile	ZYM Mobile 200GB Roam Saver SIM Only 200GB data on Singtel network 300 Minutes 100 Messages Deal: Get 100GB of bonus Malaysia Roaming Data for 365 days $7.77 + $3 Upfront Min. cost $10.77 Go	$7.77 + $3 Upfront Min. cost $10.77	Go
#6	Maxx	Maxx 290GB SIM Only 290GB data on M1 network 500 Minutes 99 Messages Deal: Online Exclusive: $7.90 promotional price for the first 12 cycles for new sign-ups and number port-ins $7.90 Min. cost $7.90 Go	$7.90 Min. cost $7.90	Go
#7	Eight Editor's Pick	Eight Editor's Pick Double Eight SIM Only 388GB data on StarHub network 588 Minutes 88 Messages $8 Min. cost $8 Go	$8 Min. cost $8	Go
#8	SIMBA Editor's Pick	SIMBA Editor's Pick SuperRoam 10 SIM Only 400GB data SIMBA mobile digital network (5G) Unlimited National Calls 30 Messages Deal: Port-in & get free $20 credits $10 Min. cost $10 Go	$10 Min. cost $10	Go
#9	Changi Mobile	Changi Mobile 180GB FlexiLite SIM Only 180GB data on M1 network 200 Minutes 50 Messages $10 + $5 Upfront Min. cost $15 Go	$10 + $5 Upfront Min. cost $15	Go
#10	GOMO	GOMO 4G Saver SIM Only 88GB data on Singtel's 4G network 100 Minutes 100 Messages $10.18 + $2 Upfront Min. cost $12.18 Go	$10.18 + $2 Upfront Min. cost $12.18	Go

Also good: MyRepublic and Maxx also offer great value plans with generous data and roaming inclusions.

Best SIM-only plan Singapore: Everyday use

Editor's Pick

SuperRoam 10 SIM Only

400GB data
SIMBA mobile digital network (5G)
Unlimited National Calls
30 Messages
Deal: Port-in & get free $20 credits

$10

Min. cost $10

$10

Min. cost $10

What we love: SIMBA takes the crown this month with an unbeatable offer. Get 400B of data (for use in Data Bundled for use in Singapore, Malaysia, Hong Kong & Indonesia) 12GB APAC Roaming (Bangladesh, Hong Kong, Indonesia, Malaysia, Taiwan, Thailand, Vietnam) and 3GB International Roaming to selected countries, 500 IDD minutes to selected countries, and 100 minutes to Myanmar – all at an incredible price of $10.

Also consider the following:

#1	Maxx	Maxx 400GB SIM Only 400GB data on M1 5G network 500 Minutes 50 Messages $10 Min. cost $10 Go	$10 Min. cost $10	Go
#2	SIMBA Editor's Pick	SIMBA Editor's Pick SuperRoam 10 SIM Only 400GB data SIMBA mobile digital network (5G) Unlimited National Calls 30 Messages Deal: Port-in & get free $20 credits $10 Min. cost $10 Go	$10 Min. cost $10	Go
#3	VIVIFI	VIVIFI Vibe 4G 300GB data on Singtel's 4G network 588 Minutes 100 Messages Deal: Get 3 months free for new sign up + 6 months free for port-ins+ Free 5G Trial for 3 months (non-Singtel port in) $10 Min. cost $10 Go	$10 Min. cost $10	Go
#4	ZYM Mobile	ZYM Mobile 300GB Roam Plus SIM Only 300GB data on Singtel network 1000 Minutes 100 Messages Deal: 3 mths free from from 4th-6th for a new number + 600GB of bonus Malaysia, Indonesia & Thailand Roaming Data for 365 days $10.10 + $3 Upfront Min. cost $13.10 Go	$10.10 + $3 Upfront Min. cost $13.10	Go
#5	Eight	Eight Fortune Eight SIM Only 488GB data on StarHub network 688 Minutes 128 Messages Deal: Extra 8GB APAC Roaming $11.80 Min. cost $11.80 Go	$11.80 Min. cost $11.80	Go
#6	Circles.Life	Circles.Life 5G Most Unrestricted 450GB data on M1 5G network Unlimited National Calls 25 Messages whistleOut Exclusive: 450GB for just $12/month for the first 6 months, reverts to 250GB at $18 forever after. T&Cs apply. $12 + $0.30 Upfront Min. cost $12.30 Go	$12 + $0.30 Upfront Min. cost $12.30	Go
#7	CMLink	CMLink 400GB 4G SIM Only 400GB data on Singtel's 4G network 600 Minutes 100 Messages Deal: 600GB Indonesia, Thailand & Malaysia roaming for 365 days + enjoy a 5G trial when you port in. $15 Min. cost $15 Go	$15 Min. cost $15	Go

Also good: Eight and Maxx also offer great value SIM plans.

Best SIM-only plan Singapore: Heavy use

Editor's Pick

5G SIM Only 300GB

1024GB data
M1 5G network
1000 Minutes
1000 Messages
Deal: Bonus 724GB is for local data usage + $3 off first 3 months for new sign-ups and port-ins only

$17.95

Min. cost $14.95

$17.95

Min. cost $14.95

What we love: SIMBA takes the win this month with an unbeatable bonus data promotion. Get 1024GB of data forever (includes bonus 724GB is for local data usage) for a discounted price for $14.95 for the first three months, 17.95 thereafter. You will also get M1 Cashback and Unlimited Weekend Data. Don’t miss out on this fantastic offer.

Also consider the following:

#1	SIMBA Editor's Pick	SIMBA Editor's Pick SuperRoam 12 SIM Only 500GB data SIMBA mobile digital network (5G) Unlimited National Calls 100 Messages Deal: Port-in & get free $20 credits $12 Min. cost $12 Go	$12 Min. cost $12	Go
#2	M1 Editor's Pick	M1 Editor's Pick 5G SIM Only 300GB 1024GB data M1 5G network 1000 Minutes 1000 Messages Deal: Bonus 724GB is for local data usage + $3 off first 3 months for new sign-ups and port-ins only $17.95 Min. cost $14.95 Go	$17.95 Min. cost $14.95	Go
#3	MyRepublic	MyRepublic 5G Basic $17.95 550GB data M1 5G network 1200 Minutes 1200 Messages Deal: New sign up: $11.99/mth for first 3 mths, thereafter $17.95/mth $17.95/mth Min. cost $11.99 Go	$17.95/mth Min. cost $11.99	Go
#4	redONE	redONE Best 20 500GB data on StarHub 4G network 1000 Minutes 500 Messages $20.90 Min. cost $20.90 Go	$20.90 Min. cost $20.90	Go
#5	Circles.Life	Circles.Life 5G Plus 650GB data on M1 5G network Unlimited National Calls Deal: Get 650GB for just $18/month for the first 3 months, reverts to 500GB for $22 forever after $22 + $0.30 Upfront Min. cost $18.30 Go	$22 + $0.30 Upfront Min. cost $18.30	Go
#6	Giga	Giga 1TB 5G SIM Only 1000GB data on StarHub 5G network 1500 Minutes 1500 Messages $28 + $2.04 Upfront Min. cost $30.04 Go	$28 + $2.04 Upfront Min. cost $30.04	Go
#7	GOMO	GOMO 5G+ Asia Infinity Unlimited data on Singtel's 5G network in selected areas with 5G devices Unlimited National Calls & SMS $30.56 + $2 Upfront Min. cost $32.56 Go	$30.56 + $2 Upfront Min. cost $32.56	Go

Also good: SIMBA and MyRepublic also offer SIM plans with huge data.

Best Prepaid SIM plan in Singapore

Editor's Pick

588GB Tourist eSIM

588GB data
on StarHub network
No Calls Included

$18

Per 30 Day Renewal

$18

Per 30 Day Renewal

What we love: Eight is our pick this month for Best Prepaid eSIM Plan with International Calls in Singapore. You will get 588GB data and 12GB APAC Roaming & 6GB International Roaming & 58GB Malaysia Roaming.

Also consider the following:

#1	Eight Editor's Pick	Eight Editor's Pick 588GB Tourist eSIM 588GB data on StarHub network No Calls Included $18 Per 30 Day Renewal Go	$18 Per 30 Day Renewal	Go
#2	Singtel	Singtel $30 5G+ Tourist eSIM Unlimited data Singtel 4G network No Calls Included $30 Per 28 Day Renewal Go	$30 Per 28 Day Renewal	Go
#3	StarHub	StarHub $30 Traveler+ Data eSIM Unlimited data StarHub 4G network No Calls Included $30 Per 28 Day Renewal Go	$30 Per 28 Day Renewal	Go

Also good: You can also checkout Singtel and Starhub.

Best SIM plan with international calls in Singapore

Editor's Pick

SuperRoam 12 SIM Only

500GB data
SIMBA mobile digital network (5G)
Unlimited National Calls
100 Messages
Deal: Port-in & get free $20 credits

$12

Min. cost $12

$12

Min. cost $12

What we love: SIMBA is our pick this month for Best Plan with International Calls in Singapore. You will get 500GB data, 600 IDD minutes to 20+ selected countries + 100 mins Myanmar. You will also get 18GB APAC Roaming and 8GB Roaming to selected countries. IDD calling to Australia, Bangladesh, Brazil, Brunei, Canada, China, Hong Kong, India, Indonesia, Ireland, Israel, Italy, Japan, Malaysia, Mongolia, New Zealand, Norway, Romania, South Korea, Thailand, USA.

Also consider the following:

#1	Maxx	Maxx 500GB SIM Only 500GB data on M1 5G network 500 Minutes 50 Messages $12 Min. cost $12 Go	$12 Min. cost $12	Go
#2	SIMBA Editor's Pick	SIMBA Editor's Pick SuperRoam 12 SIM Only 500GB data SIMBA mobile digital network (5G) Unlimited National Calls 100 Messages Deal: Port-in & get free $20 credits $12 Min. cost $12 Go	$12 Min. cost $12	Go
#3	Eight	Eight Triple Eight SIM Only 588GB data on StarHub network 888 Minutes 188 Messages Deal: Extra 8GB APAC Roaming + 8GB International Roaming $18 Min. cost $18 Go	$18 Min. cost $18	Go
#4	redONE	redONE Best 20 500GB data on StarHub 4G network 1000 Minutes 500 Messages $20.90 Min. cost $20.90 Go	$20.90 Min. cost $20.90	Go
#5	Singtel	Singtel 5G+ $35 Ultimate Monthly Plan Unlimited data Singtel 5G network Unlimited National Calls & SMS $35 Per 30 Day Renewal Go	$35 Per 30 Day Renewal	Go

Also good: You can also checkout Singtel, Eight, Maxx and RedOne for international calling.

How we chose the best SIM plans each month

At WhistleOut, we take the job of recommending our monthly winners and runners-up very seriously. That’s why we have a dedicated team that reads over more than 300 plan documents each week to spot hundreds of plan changes in our database every month.

When it comes to the SIM-only plans in our comparison engine, we take a wide array of factors into consideration. For starters, there are the basics. All of our monthly plan winners and runners-up come with the most minutes and text in Singapore, plus we tend to lean towards SIM-only plans with no contracts. We like no-contract plans because it’s easier to switch mobile providers when a better option comes along.

After the basics, our first key consideration is price, and not just promotional pricing. To help offer a fuller picture of actual costs, we evaluate price in terms of first-year value, which helps separate actual great pricing from a limited-time promotion that may not offer better value in the long run. For promotional pricing to be considered, it has to last at least six months.

The other big consideration with any phone plan is how much data it comes with, and SIM-only plans are no exception. We use included monthly base and bonus data alongside pricing (promotional or regular) to help determine the overall dollars-to-data value which, like the promotional-pricing disclaimer above, can help level out a great data offer from one that only has short-term worth.