Contact Energy mobile vs Mercury Mobile
Contact Energy mobile wins all 3 usage types on value. Contact Energy mobile has the cheaper entry-level plan. Contact Energy mobile has the highest-scoring plan for value and features. Contact Energy 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 | Contact Energy mobile | Mercury Mobile |
|---|---|---|
| Network | One NZ | Spark |
| Plans listed | 4 | 5 |
| Cheapest plan (per month) | $16.00 | $19.00 |
| Cheapest unlimited | None | None |
| Best SmartScore | 9.2 | 6.2 |
| Prepay plans | No | No |
| Pay monthly plans | Yes | Yes |
| eSIM | Yes | – |
| 5G | Yes | – |
| WiFi calling | Yes | Yes |
Which should you choose?
Light use
Under 5GB: messaging, maps, a bit of social
- Contact Energy mobileBetter value
- Extra Small (2GB Carryover)2GB/mo · $16/mo · 9.2/10
- Mercury Mobile
- 1.25GB Rollover Data1.25GB/mo · $19/mo · 6.2/10
Contact Energy mobile's Extra Small (2GB Carryover) (2GB/mo, $16/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
- Contact Energy mobileBetter value
- Medium (Endless)20GB/mo + endless · $45/mo · 8.1/10
- Mercury Mobile
- 5GB Endless+ Data5GB/mo + endless · $39/mo · 2.6/10
Contact Energy mobile's Medium (Endless) (20GB/mo + endless, $45/mo) costs more than Mercury Mobile's 5GB Endless+ Data (5GB/mo + endless, $39/mo), but scores higher (8.1 vs 2.6) for what you get.
Heavy use
40GB+ or unlimited: lots of video, hotspotting
- Contact Energy mobileBetter value
- Large (Endless)75GB/mo + endless · $60/mo · 4.3/10
- Mercury Mobile
- 50GB Endless+ Data50GB/mo + endless · $59/mo · 3.5/10
Contact Energy mobile's Large (Endless) (75GB/mo + endless, $60/mo) costs more than Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo), but scores higher (4.3 vs 3.5) for what you get.
Choose Contact Energy mobile if…
- You want the better plan for light, everyday and heavy use
- You want the cheapest way in (from $16/mo)
- One NZ coverage is better where you live
Choose Mercury Mobile if…
- Spark coverage is better where you live
Every Contact Energy mobile and Mercury Mobile plan
| Plan | Calls | ? | ? | Actions | |
|---|---|---|---|---|---|
Contact Energy mobileExtra Small (2GB Carryover) | 2GB/moRollover | 200 mins | $16/moPaid monthly | 9.2/10 | View deal |
Contact Energy mobileMedium (Endless) | 20GB/mo + endless | Unlimited | $45/moPaid monthly | 8.1/10 | 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 |
Contact Energy mobileSmall (Endless) | 5GB/mo + endless | Unlimited | $35/moPaid monthly | 5.3/10 | View deal |
Contact Energy mobileLarge (Endless) | 75GB/mo + endless | Unlimited | $60/moPaid monthly | 4.3/10 | 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, Contact Energy mobile or Mercury Mobile?
Contact Energy mobile wins all 3 usage types on value. Contact Energy mobile has the cheaper entry-level plan. Contact Energy mobile has the highest-scoring plan for value and features. Contact Energy mobile uses the One NZ network and Mercury Mobile uses Spark, so check coverage where you live and work. Light use: Contact Energy mobile's Extra Small (2GB Carryover) (2GB/mo, $16/mo) costs less than Mercury Mobile's 1.25GB Rollover Data (1.25GB/mo, $19/mo) and scores higher. Everyday use: Contact Energy mobile's Medium (Endless) (20GB/mo + endless, $45/mo) costs more than Mercury Mobile's 5GB Endless+ Data (5GB/mo + endless, $39/mo), but scores higher (8.1 vs 2.6) for what you get. Heavy use: Contact Energy mobile's Large (Endless) (75GB/mo + endless, $60/mo) costs more than Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo), but scores higher (4.3 vs 3.5) for what you get.
Is Contact Energy mobile or Mercury Mobile cheaper?
Contact Energy mobile’s cheapest plan is Extra Small (2GB Carryover) (2GB/mo) at $16.00 a month. Mercury Mobile’s cheapest is 1.25GB Rollover Data (1.25GB/mo) at $19.00 a month.
Do Contact Energy mobile and Mercury Mobile use the same network?
No. Contact Energy mobile uses One NZ and Mercury Mobile uses Spark.
Can I switch from Contact Energy 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 Contact Energy mobile first.