Compare & Save: 2025’s Top Mobile Line Deals

If you’re tired of paying too much for your phone bill, now’s a great time to switch. Mobile carriers are offering aggressive discounts on unlimited plans, especially if you already have home internet with providers like Spectrum, Xfinity, or Optimum. In this guide, we break down the latest mobile deals, compare monthly pricing, and show you how much you can save over a year when you switch from Verizon, AT&T, or T-Mobile. Whether you’re looking for one line or a family plan, this article will help you find the best value for your money.

Spectrum Mobile: Best Current Offers

Free Unlimited line for a full year when bundled with Spectrum Internet plans. This offer includes one Unlimited mobile line at no cost for 12 months — excellent value for new Internet + mobile customers
Unlimited plans for additional lines:
- Unlimited: $30/mo per line
- Unlimited Plus: $40/mo per line (includes “Anytime Upgrade”)
- Both require Spectrum Internet and come with no contracts or hidden fees, with reduced speeds past data thresholds (30 GB or 50 GB)
Device rebates up to $1,000 off popular devices like Galaxy Z Fold7 or Flip7 when paired with Unlimited line and qualifying trade‑in.

Summary: Bundle internet and mobile to score one free Unlimited line and steep device discounts with trade‑ins.

Xfinity Mobile: Heavy Incentives with Internet Bundle

Free Unlimited line included for one year with Xfinity Internet (300 Mbps or faster). Upgrade to Premium Unlimited for just $10/mo more for the first 12 months.
Multiline pricing:
- Unlimited: $20/line (for 2+ lines)
- Unlimited Plus (Premium): $30/line (for 2+ lines) after promo.
Trade‑in offers: Up to $500 back per line to pay off current contracts, or up to $2,500 total for up to five lines with qualifying trade‑ins (offer expires 9/30/2025).
Device deals: Up to $830 off eligible iPhones and $1,000 off Samsung Galaxy S25 series with new Premium Unlimited line and trade‑in.

Summary: Perfect if you already have Xfinity internet—get promotional rates, multiline discounts, device rebates, and flexible upgrades.

Optimum Mobile: Strong Multiline Promotion & Bundles

2 lines of Unlimited for $45/mo, or 2 lines of Unlimited Max for $55/mo, via monthly bill credits over 12 months. Transfers must be completed within 14 days and autopay is required.
Standalone rates (1 line):
- 1 GB: $15/mo
- 3 GB: $25/mo
- Unlimited: $45/mo single, $30‑$25 for 2‑4 or 5+ lines
- Unlimited Max (50 GB cap): $55 single, down to $35 for 5 lines.
Device rebates: Deep discounts on Apple iPhone 16 Pro Max (as low as $209), iPhone 16 Pro ($9), Galaxy S25+ ($510/mo ×36) and others when switching or upgrading with trade‑in.

Summary: Great for families adding multiple lines. Combine with Optimum Internet for freebies and low-cost upgrades.

Compare at a glance:

Annual Savings Comparison: Unlimited Mobile Plans (2025)

Assumptions:

All plans are Unlimited data (some with premium caps or deprioritization).
Savings assume no promotional credits, just regular, ongoing monthly pricing.
Major carriers vary by market; used national average rates as of July 2025.
Xfinity & Spectrum prices require bundling with internet. Optimum also requires internet for best pricing.

Yearly Savings Highlights:

A single-line user can save up to $540/year by choosing Xfinity or Spectrum over Verizon or AT&T.
A two-line household switching from AT&T/Verizon ($1,560/year) to Optimum ($540/year) could save up to $1,020/year.
Even vs. T-Mobile’s budget-friendly plans, you save $300–$900 annually by switching to a Spectrum/Xfinity/Optimum 1 or 2 line plan.

Tips & Fine Print Notes

Bundling matters:
All three providers offer best deals only when paired with qualifying internet service.
Autopay & credit:
Expect bill credits to post over multiple cycles—keep autopay active and maintain good standing.
Trade‑ins required:
Most device offers rely on qualifying trade‑in within a deadline (usually 14 days).
Promotions expire soon:
Xfinity’s rebate offer ends September 30, 2025, and device-specific promotions have varied cut‑off dates in July–August 2025.

Data speeds: Unlimited plans may throttle after 30 GB or 50 GB. Hotspot allotments vary. Check plan disclosures to avoid surprises.

Final Thoughts

Spectrum Mobile
is ideal if you’re new to Spectrum Internet—free Unlimited mobile and steep device savings.
Xfinity Mobile
delivers the most comprehensive device trade-in offers and robust multi-line discounts for internet subscribers.
Optimum Mobile
stands out with aggressive 2-line pricing and even a free promo line using a special code when tied to high‑speed Internet service.