AT&T vs Comcast: Which Telecom Stock Should You Bet On?

U.S. telecoms are forecast to grow at a 6.8% CAGR through 2029 driven by 5G, fiber and rising mobile data; Zacks compares AT&T and Comcast within that backdrop. AT&T showed Q3 service-revenue momentum with 288,000 net fiber adds and 270,000 Internet Air subscribers, has deployed EchoStar mid-band across ~23,000 cell sites (improving download speeds ~80% for mobility and ~55% for Internet Air) and is integrating AI to boost service efficiency—moves Zacks says should support margins and cash flow despite carrier competition. Comcast is focused on broadband and DOCSIS 3.1/4.0 upgrades but faces weakness in video/ads and a slight revenue decline in its Residential segment; Zacks projects 2025 sales/EPS of +2.14%/‑8.85% for AT&T (EPS revisions trending up) versus ‑0.07%/‑3.46% for Comcast (EPS revisions trending down), notes AT&T’s superior YTD stock performance (+4.1% vs Comcast ‑31.4%) though Comcast trades cheaper (6.7x vs 10.8x forward P/E), and concludes both are Zacks Rank 3 (Hold) but AT&T is better positioned currently.

Analysis

The U.S. telecom market is projected to grow at a 6.8% CAGR from 2024–2029 driven by 5G, fiber expansion and rising mobile data; within that backdrop AT&T reported Q3 momentum with service-revenue improvement, 288,000 net fiber additions and 270,000 Internet Air subscribers, and has deployed EchoStar mid-band across ~23,000 cell sites spanning 5,300 cities in 48 states—claims of ~80% mobility and ~55% Internet Air download-speed improvements were highlighted. AT&T is also rolling out AI tools (Ask AT&T Workflows) to reduce service friction and improve efficiency, which Zacks links to potential margin and cash-flow upside, even as Zacks projects 2025 sales +2.14% and EPS -8.85% with EPS revisions trending up over 60 days. Comcast’s Residential Connectivity & Platforms revenue declined 1.5% YoY in Q3 due to video/ads weakness, though domestic broadband/wireless partially offset this; Comcast is deploying DOCSIS 3.1/4.0 over its HFC network and expects the Lumen mass-market asset to add 1M fiber customers and 4M locations (close expected early 2026) toward a 60M-location target. Valuation and estimates diverge: AT&T has outperformed over the past year (+4.1% vs CMCSA -31.4%), EPS trends favor AT&T, while Comcast trades cheaper on forward P/E (6.72 vs 10.79) but faces negative estimate revisions and execution/timing risks from intensified fiber competition (Verizon) and capital intensity.

Key Decisions for Investors

• Favor a modest overweight to AT&T versus Comcast for near- to medium-term exposure to U.S. 5G and fiber momentum given AT&T’s recent net fiber adds, EchoStar spectrum deployment and improving EPS revisions, while sizing positions to reflect AT&T’s projected 2025 EPS decline and sector competition
• Consider a selective, smaller tactical allocation to Comcast as a value/recovery trade because of the low forward P/E (6.72) and DOCSIS 4.0 roadmap, but require an observable reversal in subscriber trends or EPS estimate downticks before increasing exposure
• Monitor key KPIs (monthly net fiber adds, Internet Air subscriber growth, Residential Connectivity revenues, reported speed metrics, EPS estimate revisions and the Lumen deal closing timeline expected early 2026) as triggers to adjust positioning
• Use downside protection (e.g., options or stop limits) or hedge correlated telecom exposure given high capex requirements and intensified competition from Verizon and others that could compress margins or delay returns