Mercury Mobile mobile plans

Energy retailer's pay-monthly mobile 'Powered by Spark's network'; mobile is added to a Mercury energy/broadband account, currently 12 months half price when bundled.

Network
Spark
Plans listed
5
Price range
$19–$79/mo
eSIM
Unknown
5G
Unknown
WiFi calling
Yes

Is Mercury Mobile any good?

Pros

  • One of the cheapest ways in, from $19/mo
  • Rollover data on some plans
  • Endless data: slows down instead of cutting off
  • No fixed-term contracts
  • WiFi calling

Cons

  • No prepay plans
  • No unlimited data plans
  • Only available with a Mercury power or broadband account

For light use

Under 5GB: messaging, maps, a bit of social

Mercury Mobile
1.25GB Rollover Data1.25GB/mo · $19/mo · 6.2/10

For everyday use

5GB to 40GB: streaming music, social and some video

Mercury Mobile
5GB Endless+ Data5GB/mo + endless · $39/mo · 2.6/10

For heavy use

40GB+ or unlimited: lots of video, hotspotting

Mercury Mobile
50GB Endless+ Data50GB/mo + endless · $59/mo · 3.5/10

Our verdict covers plans, prices and features, worked out from our data (prices checked 12 October 2026). It doesn't rate customer service or coverage, so check Consumer NZ’s surveys and the Spark coverage map too.

Best value Mercury Mobile plans

All Mercury Mobile plans

Data
Budget per month
Showing 5 of 5 plans
PlanCalls??
Mercury Mobile1.25GB Rollover DataTop valuePay monthlyBundle only
1.25GB/moRollover250 mins$19/moPaid monthly6.2/10View deal
Mercury Mobile2.5GB Rollover DataPay monthlyBundle only
2.5GB/moRollover350 mins$29/moPaid monthly6.0/10View deal
Mercury Mobile50GB Endless+ DataPay monthlyBundle only
50GB/mo + endlessUnlimited$59/moPaid monthly3.5/10View deal
Mercury Mobile5GB Endless+ DataPay monthlyBundle only
5GB/mo + endlessUnlimited$39/moPaid monthly2.6/10View deal
Mercury Mobile150GB Endless+ DataPay monthlyBundle only
150GB/mo + endlessUnlimited$79/moPaid monthly2.2/10View deal

Mercury Mobile FAQs

Is Mercury Mobile any good?

On plans and price: One of the cheapest ways in, from $19/mo; Rollover data on some plans; Endless data: slows down instead of cutting off. Downsides: no prepay plans; no unlimited data plans. For customer service, check independent surveys such as Consumer NZ's.

What network does Mercury Mobile use?

Mercury Mobile uses the Spark network, so coverage is broadly the same as Spark.

What is the cheapest Mercury Mobile plan?

The cheapest Mercury Mobile plan we list is 1.25GB Rollover Data at $19 per month with 1.25GB/mo of data.

Does Mercury Mobile have prepay and pay monthly plans?

Mercury Mobile only offers pay monthly plans in our comparison.