Kogan Mobile vs Mercury Mobile
Kogan Mobile wins 2 of 3 usage types on value. Kogan Mobile has the cheaper entry-level plan. Kogan Mobile has the highest-scoring plan for value and features. Kogan Mobile uses the One NZ network and Mercury Mobile uses Spark, so check coverage where you live and work.
Prices checked 12 October 2026
| Feature | Kogan Mobile | Mercury Mobile |
|---|---|---|
| Network | One NZ | Spark |
| Plans listed | 7 | 5 |
| Cheapest plan (per month) | $17.00 | $19.00 |
| Cheapest unlimited | None | None |
| Best SmartScore | 8.3 | 6.2 |
| Prepay plans | Yes | No |
| Pay monthly plans | No | Yes |
| eSIM | No | – |
| 5G | Yes | – |
| WiFi calling | – | Yes |
Which should you choose?
Light use
Under 5GB: messaging, maps, a bit of social
- Kogan MobileBetter value
- Standard Monthly Prepay2GB/mo · $17/mo · 7.7/10
- Mercury Mobile
- 1.25GB Rollover Data1.25GB/mo · $19/mo · 6.2/10
Kogan Mobile's Standard Monthly Prepay (2GB/mo, $17/mo) costs less than Mercury Mobile's 1.25GB Rollover Data (1.25GB/mo, $19/mo) and scores higher.
Everyday use
5GB to 40GB: streaming music, social and some video
- Kogan MobileBetter value
- Bigger Monthly Prepay15GB/mo · $40/mo · 8.3/10
- Mercury Mobile
- 5GB Endless+ Data5GB/mo + endless · $39/mo · 2.6/10
Kogan Mobile's Bigger Monthly Prepay (15GB/mo, $40/mo) costs more than Mercury Mobile's 5GB Endless+ Data (5GB/mo + endless, $39/mo), but scores higher (8.3 vs 2.6) for what you get.
Heavy use
40GB+ or unlimited: lots of video, hotspotting
- Kogan Mobile
- Biggest Monthly Prepay60GB/mo · $60/mo · 3.3/10
- Mercury MobileBetter value
- 50GB Endless+ Data50GB/mo + endless · $59/mo · 3.5/10
Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo) costs less than Kogan Mobile's Biggest Monthly Prepay (60GB/mo, $60/mo) and scores higher.
Choose Kogan Mobile if…
- You want the better plan for light and everyday use
- You want the cheapest way in (from $17/mo)
- You want prepay, with no bill or credit check
- You want to pay once for the whole year
- One NZ coverage is better where you live
Choose Mercury Mobile if…
- You want the better plan for heavy use
- You prefer a monthly bill
- You want unused data to roll over
- You want data that slows down instead of running out
- Spark coverage is better where you live
Every Kogan Mobile and Mercury Mobile plan
| Plan | Calls | ? | ? | Actions | |
|---|---|---|---|---|---|
Kogan MobileBig 365 Day Prepay | 50GB/year≈ 4.2GB/mo | Unlimited | $20.83/moPaid as $250 once a year | 8.3/10 | View deal |
Kogan MobileBigger 365 Day Prepay | 150GB/year≈ 13GB/mo | Unlimited | $33.33/moPaid as $400 once a year | 8.3/10 | View deal |
Kogan MobileBigger Monthly Prepay | 15GB/mo | Unlimited | $40/moPaid monthly | 8.3/10 | View deal |
Kogan MobileStandard Monthly Prepay | 2GB/mo | Unlimited | $17/moPaid monthly | 7.7/10 | View deal |
Kogan MobileBig Monthly Prepay | 5GB/mo | Unlimited | $28/moPaid monthly | 7.1/10 | View deal |
Mercury Mobile1.25GB Rollover Data | 1.25GB/moRollover | 250 mins | $19/moPaid monthly | 6.2/10 | View deal |
Mercury Mobile2.5GB Rollover Data | 2.5GB/moRollover | 350 mins | $29/moPaid monthly | 6.0/10 | View deal |
Mercury Mobile50GB Endless+ Data | 50GB/mo + endless | Unlimited | $59/moPaid monthly | 3.5/10 | View deal |
Kogan MobileBiggest 365 Day Prepay | 500GB/year≈ 42GB/mo | Unlimited | $50/moPaid as $600 once a year | 3.3/10 | View deal |
Kogan MobileBiggest Monthly Prepay | 60GB/mo | Unlimited | $60/moPaid monthly | 3.3/10 | View deal |
Mercury Mobile5GB Endless+ Data | 5GB/mo + endless | Unlimited | $39/moPaid monthly | 2.6/10 | View deal |
Mercury Mobile150GB Endless+ Data | 150GB/mo + endless | Unlimited | $79/moPaid monthly | 2.2/10 | View deal |
Frequently asked questions
Which is better, Kogan Mobile or Mercury Mobile?
Kogan Mobile wins 2 of 3 usage types on value. Kogan Mobile has the cheaper entry-level plan. Kogan Mobile has the highest-scoring plan for value and features. Kogan Mobile uses the One NZ network and Mercury Mobile uses Spark, so check coverage where you live and work. Light use: Kogan Mobile's Standard Monthly Prepay (2GB/mo, $17/mo) costs less than Mercury Mobile's 1.25GB Rollover Data (1.25GB/mo, $19/mo) and scores higher. Everyday use: Kogan Mobile's Bigger Monthly Prepay (15GB/mo, $40/mo) costs more than Mercury Mobile's 5GB Endless+ Data (5GB/mo + endless, $39/mo), but scores higher (8.3 vs 2.6) for what you get. Heavy use: Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo) costs less than Kogan Mobile's Biggest Monthly Prepay (60GB/mo, $60/mo) and scores higher.
Is Kogan Mobile or Mercury Mobile cheaper?
Kogan Mobile’s cheapest plan is Standard Monthly Prepay (2GB/mo) at $17.00 a month. Mercury Mobile’s cheapest is 1.25GB Rollover Data (1.25GB/mo) at $19.00 a month.
Do Kogan Mobile and Mercury Mobile use the same network?
No. Kogan Mobile uses One NZ and Mercury Mobile uses Spark.
Can I switch from Kogan Mobile to Mercury Mobile and keep my number?
Yes. Sign up with Mercury Mobile and ask to transfer your number. They’ll handle the switch, and you don’t need to cancel with Kogan Mobile first.