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US Mobile vs. Boost Mobile: iPhone Duo for 3 lines
For 3 lines of iPhone Duo over 36 months, US Mobile's Unlimited Starter beats Boost Mobile's Unlimited+ by $2,048. The monthly plan price is the single biggest driver of that gap. Both sides are backed by confirmed plan pricing.
US Mobile already bakes taxes and fees into the plan price shown.
US Mobile
Unlimited Starter · Buy unlocked (Apple financing)
vs. Boost Mobile unlocked (Apple financing) over 36 months
$79.97/mo per person, 3 lines
$8,517–$8,637 over 36 months · $236.58–$239.92/mo household
$324.87/mo for 24 months, then $75.00/mo once the device is paid off.
- Activation fee unconfirmed
Resolves once US Mobile's activation fee is confirmed.
Saves $1,620 vs. your current bill over 36 months
Plus 3 new phones and setup: $5,817–$5,937, net of trade-in/resale credit.
Plan $25.00/mo + device $83.29/mo + $40.00 upfront − $59.97 cashback
iPhone Duo paid over 24 months at 0% APR via Apple Card Monthly Installments, with 3% cashback credited once.
Sales tax on the device (varies by state, typically charged upfront on full MSRP) is not included in the totals above.
US Mobile's per-line activation fee isn't confirmed — shown here as $40.00 (worst case, based on the highest verified activation fee in this dataset); best case assumes $0.
We don't have a resale value for a iPhone 16 in this condition yet, so it counts as $0 here.
Plan $25.00/mo + device $83.29/mo + $40.00 upfront − $59.97 cashback
iPhone Duo paid over 24 months at 0% APR via Apple Card Monthly Installments, with 3% cashback credited once.
Sales tax on the device (varies by state, typically charged upfront on full MSRP) is not included in the totals above.
US Mobile's per-line activation fee isn't confirmed — shown here as $40.00 (worst case, based on the highest verified activation fee in this dataset); best case assumes $0.
We don't have a resale value for a iPhone 16 in this condition yet, so it counts as $0 here.
Plan $25.00/mo + device $83.29/mo + $40.00 upfront − $59.97 cashback
iPhone Duo paid over 24 months at 0% APR via Apple Card Monthly Installments, with 3% cashback credited once.
Sales tax on the device (varies by state, typically charged upfront on full MSRP) is not included in the totals above.
US Mobile's per-line activation fee isn't confirmed — shown here as $40.00 (worst case, based on the highest verified activation fee in this dataset); best case assumes $0.
We don't have a resale value for a iPhone 16 in this condition yet, so it counts as $0 here.
Boost Mobile
Unlimited+ · Buy unlocked (Apple financing)
$98.93–$98.94/mo per person, 3 lines
$9,777–$10,685 over 36 months · $271.58–$296.82/mo household
$381.77/mo for 24 months, then $131.90/mo once the device is paid off.
- Activation fee unconfirmed,
- Provider fees unconfirmed
Resolves once Boost Mobile's activation fee is confirmed and Boost Mobile's provider fees are confirmed.
Data verified September 10, 2026.
US Mobile's provider fee: $0.00/line. Boost Mobile's provider fee: provider fee not yet confirmed.
Frequently asked
Which is cheaper for 3 lines of iPhone Duo: US Mobile or Boost Mobile?
US Mobile's Unlimited Starter costs $8,637 over 36 months for 3 lines of iPhone Duo, $2,048 less than Boost Mobile's Unlimited+ at $10,685.
What's the effective monthly cost of iPhone Duo on US Mobile vs. Boost Mobile?
US Mobile works out to $239.92/mo and Boost Mobile to $296.82/mo, each the 36-month total divided evenly by 36 — not necessarily the bill you'd see in any single month.
Are these US Mobile and Boost Mobile prices confirmed?
US Mobile's total is a computed worst/best estimate, pending a promo or fee confirmation, and Boost Mobile's is a computed worst/best estimate, pending a promo or fee confirmation. See the confidence badge on each card, and our methodology page, for what that means.