Rocket Mobile vs Mercury Mobile
Mercury Mobile wins 2 of 3 usage types on value. Mercury Mobile has the cheaper entry-level plan. Rocket Mobile has the highest-scoring plan for value and features. Rocket 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 | Rocket Mobile | Mercury Mobile |
|---|---|---|
| Network | One NZ | Spark |
| Plans listed | 4 | 5 |
| Cheapest plan (per month) | $30.00 | $19.00 |
| Cheapest unlimited | $30.00 | None |
| Best SmartScore | 9.3 | 6.2 |
| Prepay plans | Yes | No |
| Pay monthly plans | No | Yes |
| eSIM | Yes | – |
| 5G | Yes | – |
| WiFi calling | Yes | Yes |
Which should you choose?
Light use
Under 5GB: messaging, maps, a bit of social
- Rocket Mobile
- No plan in this range
- Mercury MobileBetter value
- 1.25GB Rollover Data1.25GB/mo · $19/mo · 6.2/10
Only Mercury Mobile has a plan in this range: 1.25GB Rollover Data (1.25GB/mo, $19/mo).
Everyday use
5GB to 40GB: streaming music, social and some video
- Rocket Mobile
- No plan in this range
- Mercury MobileBetter value
- 5GB Endless+ Data5GB/mo + endless · $39/mo · 2.6/10
Only Mercury Mobile has a plan in this range: 5GB Endless+ Data (5GB/mo + endless, $39/mo).
Heavy use
40GB+ or unlimited: lots of video, hotspotting
- Rocket MobileBetter value
- RocketUnlimited (10Mbps) · $40/mo · 9.3/10
- Mercury Mobile
- 50GB Endless+ Data50GB/mo + endless · $59/mo · 3.5/10
Rocket Mobile's Rocket (Unlimited (10Mbps), $40/mo) costs less than Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo) and scores higher.
Choose Rocket Mobile if…
- You want the better plan for heavy use
- You want prepay, with no bill or credit check
- One NZ coverage is better where you live
Choose Mercury Mobile if…
- You want the better plan for light and everyday use
- You want the cheapest way in (from $19/mo)
- 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 Rocket Mobile and Mercury Mobile plan
| Plan | Calls | ? | ? | Actions | |
|---|---|---|---|---|---|
Rocket MobileRocket Starter | Unlimited (2Mbps) | Unlimited | $30/moPaid monthly | 9.3/10 | View deal |
Rocket MobileRocket | Unlimited (10Mbps) | Unlimited | $40/moPaid monthlyPromo $30 | 9.3/10 | View deal |
Rocket MobileRocket Plus | Unlimited (40Mbps) | Unlimited | $45/moPaid monthlyPromo $35 | 9.3/10 | View deal |
Rocket MobileRocket Max | Unlimited | Unlimited | $75/moPaid monthlyPromo $65 | 8.3/10 | 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 |
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, Rocket Mobile or Mercury Mobile?
Mercury Mobile wins 2 of 3 usage types on value. Mercury Mobile has the cheaper entry-level plan. Rocket Mobile has the highest-scoring plan for value and features. Rocket Mobile uses the One NZ network and Mercury Mobile uses Spark, so check coverage where you live and work. Light use: Only Mercury Mobile has a plan in this range: 1.25GB Rollover Data (1.25GB/mo, $19/mo). Everyday use: Only Mercury Mobile has a plan in this range: 5GB Endless+ Data (5GB/mo + endless, $39/mo). Heavy use: Rocket Mobile's Rocket (Unlimited (10Mbps), $40/mo) costs less than Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo) and scores higher.
Is Rocket Mobile or Mercury Mobile cheaper?
Rocket Mobile’s cheapest plan is Rocket Starter (Unlimited (2Mbps)) at $30.00 a month. Mercury Mobile’s cheapest is 1.25GB Rollover Data (1.25GB/mo) at $19.00 a month.
Do Rocket Mobile and Mercury Mobile use the same network?
No. Rocket Mobile uses One NZ and Mercury Mobile uses Spark.
Can I switch from Rocket 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 Rocket Mobile first.