Build Your Plan turns mobile service into a clear set of choices: where service needs to work, how much data you need, and whether your plan should carry a number for calls and SMS. Choose coverage first, then data, then number service. Review the quote before checkout so the plan matches how you actually stay connected.
Key Takeaways
Coverage sets the countries and plan options you see next.
Every plan needs one monthly data tier.
An Onyx number is optional, but it matters when calls, SMS, recovery, or verification are part of your service.
Voice and SMS bundles attach to the number, not to data-only service.
The app quote is the final plan review before payment.
Before You Start
Create or access your Onyx account first.
Know where service needs to work. A plan choice starts with coverage, not data.
Know whether you need a number for calls, SMS, recovery, verification flows, or a stable contact point.
Confirm device compatibility before checkout if you have not used eSIM on this phone before.
Choose Coverage
Coverage controls the plan options you see next.
Onyx currently uses these public coverage bands:
United States
North America
Europe
APAC
MENA
Global
Choose a regional band when your service need stays inside that region. North America means United States and Canada.
Choose Global when you move across supported regions or when your destination does not fit a regional band. If one country matters most, check coverage before payment.
Choose Data
Choose one monthly data plan for the selected coverage.
Use 5GB for light use: messaging, maps, email, and basic browsing.
Use 15GB for regular phone use, work days, navigation, app updates, and video calls in moderation.
Use 30GB or Max when Global offers those tiers and you expect heavier travel days, hotspot use, or more media.
Use Unlimited when the selected regional or bundled plan offers it and your normal use needs a larger data lane.
Coverage quality and speed can still change by location, building, device, and local network conditions.
Choose Number Option
Choose data-only if mobile data covers the job.
Add an Onyx number if you need calls, SMS, account recovery, verification flows, or a stable contact point.
Number service depends on the selected region, telecom rules, voice support, SMS support, and number inventory. The app shows the number path before checkout.
Choose Voice And SMS
If you add an Onyx number, choose the bundle attached to that number.
Core fits light calling and SMS use.
Plus fits regular communication.
Unlimited fits heavier eligible talk and text use when the selected plan supports it.
The bundle belongs to the number. Number service stays attached to the plan.
Review Before Checkout
Before payment, review:
coverage
data allowance
number choice
voice/SMS bundle
due-today total
monthly recurring total
Change the plan before checkout if the quote does not match your intended use.
What You’ll See
Build Your Plan moves through a controlled sequence:
Choose coverage.
Choose data.
Choose number option.
Choose number bundle, if you add a number.
Review plan.
Start checkout.
The quote updates as you change the plan. Treat the quote in the app as the plan truth before payment.
Decision Check
Before checkout, make sure the plan supports the way you expect to stay connected.
| Plan choice | Check | Continuity rule | |---|---|---| | Coverage | Does the selected band include where service needs to work? | Choose the region that matches your real movement, not the cheapest label. | | Data | Does the allowance match your normal month? | Pick enough data for the work, travel, calls, and hotspot use you actually expect. | | Number | Do you need calls, SMS, recovery, verification, or a stable contact point? | Add an Onyx number when communication path matters. | | Voice/SMS | Did you choose the bundle attached to the number? | Keep number service and communication allowance together. | | Quote | Do due-today and monthly recurring totals match the plan you chose? | Treat the app quote as the final review before payment. |
When To Use Plan Help
Use plan help if the app blocks a valid plan path, a required choice does not load, or the quote does not reflect the choices shown in Build Your Plan.
Keep the useful context ready: selected coverage, data tier, number option, bundle option, and the screen where the issue appeared.
Do not send one-time codes, full card details, private keys, seed phrases, recovery phrases, signing approvals, or wallet backup material.
FAQ
How do I choose the right Onyx mobile plan?
Start with coverage, then choose data, then decide whether you need an Onyx number. If you add a number, choose a voice/SMS bundle before reviewing the quote.
Should I choose regional or Global coverage?
Choose regional coverage when your service need stays inside one supported region. Choose Global when you move across supported regions or when your destination does not fit a regional band.
How much data do I need?
Use 5GB for light use and 15GB for regular phone use. Choose a larger tier when you expect heavier work, hotspot, maps, video calls, media, or frequent travel days.
Do I need an Onyx number?
Choose data-only if mobile data covers the job. Add an Onyx number if you need calls, SMS, account recovery, verification flows, or a stable contact point.
Why do I need a bundle if I add a number?
An Onyx number includes voice and SMS entitlement. The bundle defines the calling and SMS allowance attached to that number.
Can plan options vary by region?
Yes. Coverage, data tiers, number service, voice/SMS support, and pricing can vary by region, local telecom regulation, and supported service policy.
Related Guides
Step 1
Choose coverage
Pick the region where service needs to work.
Step 2
Choose data
Select one monthly data plan for the selected coverage.
Step 3
Choose number option
Use data-only or add an Onyx number.
Step 4
Choose voice and SMS
If you add a number, choose the bundle attached to that number.
Step 5
Review the quote
Confirm due-today and monthly recurring totals before checkout.
Frequently asked questions
How do I choose the right Onyx mobile plan?
Start with coverage, then choose data, then decide whether you need an Onyx number. If you add a number, choose a voice/SMS bundle before reviewing the quote.
Should I choose regional or Global coverage?
Choose regional coverage when your service need stays inside one supported region. Choose Global when you move across supported regions or when your destination does not fit a regional band.
How much data do I need?
Use 5GB for light use, 15GB for regular phone use, and larger tiers when you expect heavier work, hotspot, maps, video calls, or frequent travel days.
Do I need an Onyx number?
Choose data-only if mobile data is enough. Add an Onyx number if you need calls, SMS, recovery, verification flows, or a stable contact point.
Why do I need a bundle if I add a number?
An Onyx number includes voice and SMS entitlement. The bundle defines the calling and SMS allowance attached to that number.
Can plan options vary by region?
Yes. Coverage, data tiers, number service, voice/SMS support, and pricing can vary by region, local telecom regulation, and supported service policy.
Ready to choose your plan?
Pick coverage, data, and number options, then review the quote before checkout.