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Meet your local partner
AT&T for business, through Sigma
We help evaluate AT&T business plans and corporate programs, subject to provider availability and account eligibility. Pricing is confirmed in your proposal; no procurement fee.
Sigma helps coordinate provider communication. Your provider remains responsible for service delivery and technical support under its agreement with you.
What Sigma handles
New lines and plan changes, device orders and upgrades, number porting, billing questions, and escalations when something goes wrong.
For multi-site and multi-island teams, we keep lines, devices, and plans organized in one place.
Compare before you commit
Sigma also offers Verizon and T-Mobile, so our recommendation is not tied to one carrier. We compare coverage where your team works, total cost, devices, and support, then recommend what fits.
Compare: Verizon · T-Mobile · All business wireless
How it works
Share your line count, locations, and a recent bill. We review your options, recommend a plan, coordinate the order or transfer, and stay involved through renewals and upgrades.
Frequently asked questions
Can we get AT&T business plans through Sigma?
We help review AT&T business options. Plans and programs depend on provider availability, account eligibility and the services requested.
Is there a fee for your help?
No procurement fee. Standalone consulting is scoped and quoted separately.
Can you help with our existing AT&T account?
We review your requirements and confirm what assistance is available for your account before requesting any changes.
Can we keep our phone numbers?
In many cases. We confirm eligibility and coordinate the transfer before changes are made.
AT&T is a trademark of its owner. Sigma Hawaii is an independent company and is not AT&T.
Get an AT&T plan review
Tell us about your plans, devices and priorities. We’ll help you compare relevant provider options.