Spark vs Mercury Mobile
Spark wins all 3 usage types on value. Spark has the cheaper entry-level plan. Spark has the highest-scoring plan for value and features. Both use the Spark network, so coverage is similar.
Prices checked 12 October 2026
| Feature | Spark | Mercury Mobile |
|---|---|---|
| Network | Spark | Spark |
| Plans listed | 12 | 5 |
| Cheapest plan (per month) | $18.00 | $19.00 |
| Cheapest unlimited | $90.00 | None |
| Best SmartScore | 7.5 | 6.2 |
| Prepay plans | Yes | 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
- SparkBetter value
- $28 Value Pack3GB/mo · $28/mo · 7.5/10
- Mercury Mobile
- 1.25GB Rollover Data1.25GB/mo · $19/mo · 6.2/10
Spark's $28 Value Pack (3GB/mo, $28/mo) costs more than Mercury Mobile's 1.25GB Rollover Data (1.25GB/mo, $19/mo), but scores higher (7.5 vs 6.2) for what you get.
Everyday use
5GB to 40GB: streaming music, social and some video
- SparkBetter value
- 8GB Endless Plan8GB/mo + endless · $55/mo · 5.2/10
- Mercury Mobile
- 5GB Endless+ Data5GB/mo + endless · $39/mo · 2.6/10
Spark's 8GB Endless Plan (8GB/mo + endless, $55/mo) costs more than Mercury Mobile's 5GB Endless+ Data (5GB/mo + endless, $39/mo), but scores higher (5.2 vs 2.6) for what you get.
Heavy use
40GB+ or unlimited: lots of video, hotspotting
- SparkBetter value
- $90 Unlimited Value PackUnlimited · $90/mo · 6.1/10
- Mercury Mobile
- 50GB Endless+ Data50GB/mo + endless · $59/mo · 3.5/10
Spark's $90 Unlimited Value Pack (Unlimited, $90/mo) costs more than Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo), but scores higher (6.1 vs 3.5) for what you get.
Choose Spark if…
- You want the better plan for light, everyday and heavy use
- You want the cheapest way in (from $18/mo)
- You want prepay, with no bill or credit check
Choose Mercury Mobile if…
There's no area where Mercury Mobile clearly comes out ahead on our data.
Every Spark and Mercury Mobile plan
| Plan | Calls | ? | ? | Actions | |
|---|---|---|---|---|---|
Spark$28 Value Pack | 3GB/moRollover | 300 mins | $28/moPaid monthly | 7.5/10 | View deal |
Spark$18 Value Pack | 1GB/moRollover | 100 mins | $18/moPaid monthly | 6.5/10 | View deal |
Mercury Mobile1.25GB Rollover Data | 1.25GB/moRollover | 250 mins | $19/moPaid monthly | 6.2/10 | View deal |
| Unlimited | Unlimited | $90/moPaid monthly | 6.1/10 | View deal | |
Mercury Mobile2.5GB Rollover Data | 2.5GB/moRollover | 350 mins | $29/moPaid monthly | 6.0/10 | View deal |
SparkUnlimited Data Plan | Unlimited | Unlimited | $95/moPaid monthly | 5.3/10 | View deal |
Spark8GB Endless Plan | 8GB/mo + endless | Unlimited | $55/moPaid monthly | 5.2/10 | View deal |
| 20GB/moRollover | Unlimited | $60/moPaid monthly | 5.0/10 | View deal | |
Spark$23 Value Pack | 2GB/moRollover | 200 mins | $23/moPaid monthly | 4.8/10 | View deal |
| Unlimited | Unlimited | $100/moPaid monthly | 4.6/10 | View deal | |
| 4.5GB/moRollover | Unlimited | $40/moPaid monthly | 4.0/10 | View deal | |
Spark4GB Rollover Plan | 4GB/moRollover | Unlimited | $45/moPaid monthly | 4.0/10 | View deal |
Mercury Mobile50GB Endless+ Data | 50GB/mo + endless | Unlimited | $59/moPaid monthly | 3.5/10 | View deal |
Spark75GB Endless Plan | 75GB/mo + endless | Unlimited | $68/moPaid monthly | 3.3/10 | View deal |
Spark150GB Endless Plan | 150GB/mo + endless | Unlimited | $78/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, Spark or Mercury Mobile?
Spark wins all 3 usage types on value. Spark has the cheaper entry-level plan. Spark has the highest-scoring plan for value and features. Both use the Spark network, so coverage is similar. Light use: Spark's $28 Value Pack (3GB/mo, $28/mo) costs more than Mercury Mobile's 1.25GB Rollover Data (1.25GB/mo, $19/mo), but scores higher (7.5 vs 6.2) for what you get. Everyday use: Spark's 8GB Endless Plan (8GB/mo + endless, $55/mo) costs more than Mercury Mobile's 5GB Endless+ Data (5GB/mo + endless, $39/mo), but scores higher (5.2 vs 2.6) for what you get. Heavy use: Spark's $90 Unlimited Value Pack (Unlimited, $90/mo) costs more than Mercury Mobile's 50GB Endless+ Data (50GB/mo + endless, $59/mo), but scores higher (6.1 vs 3.5) for what you get.
Is Spark or Mercury Mobile cheaper?
Spark’s cheapest plan is $18 Value Pack (1GB/mo) at $18.00 a month. Mercury Mobile’s cheapest is 1.25GB Rollover Data (1.25GB/mo) at $19.00 a month.
Do Spark and Mercury Mobile use the same network?
Yes, both use the Spark network.
Can I switch from Spark 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 Spark first.