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Quantum Fiber Internet + AT&T wireless: save $480 over 12 monthsAvailable to new residential Quantum Fiber customers who have or purchase an eligible postpaid AT&T wireless plan. Customers will receive a $40/mo discount on the AT&T wireless bill for the first 12 months. Pay full plan cost for wireless plan until discount is applied within 1-3 bill cycles. Wireless and Internet accounts must match names and addresses to qualify. Req’d Wireless: Postpaid unlimited voice & data plan for smartphones (for new customers min $60/mo. before discounts). Eligible plans: AT&T Value 2.0, AT&T Extra 2.0, AT&T Premium 2.0, AT&T Elite 2.0. See Quantum Fiber’s website for full terms and conditions. • Sponsored Sign up for Quantum Fiber Internet and save $480 on AT&T wireless over 12 monthsAvailable to new residential Quantum Fiber customers who have or purchase an eligible postpaid AT&T wireless plan. Customers will receive a $40/mo discount on the AT&T wireless bill for the first 12 months. Pay full plan cost for wireless plan until discount is applied within 1-3 bill cycles. Wireless and Internet accounts must match names and addresses to qualify. Req’d Wireless: Postpaid unlimited voice & data plan for smartphones (for new customers min $60/mo. before discounts). Eligible plans: AT&T Value 2.0, AT&T Extra 2.0, AT&T Premium 2.0, AT&T Elite 2.0. See Quantum Fiber’s website for full terms and conditions.  Sponsored

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View native coverage from a regional network

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South Portland Cell Coverage Map

The coverage map shows native (non-roaming) coverage in South Portland, ME.

The map displays predicted outdoor signal quality. Indoor signal, congestion, and roaming coverage aren't mapped. Each can matter in practice.

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Data Sourcing

Cell coverage data for South Portland, ME comes primarily from the May 2026 release of the FCC's Broadband Data Collection program (representing networks as of December 2025), supplemented with real-world measurements from large crowdsourcing projects.