Galaxy S21 vs Galaxy S7: which is better to own and fix?

We compare Samsung Galaxy S phones the way a repair shop should — not just benchmarks and cameras, but what breaks, what fixes cost, and which chassis is less painful on our bench.

Quick take

Pick Galaxy S21 if better repairability and parts story in our shop. Both are Galaxy S phones, so you're still in Android flagship repair territory — but the gap matters when you crack a screen or need a battery.

Spec & repair snapshot

See the comparison table below for release year, chip, display, repairability scores, and the #1 failure we see on each model.

Galaxy S21 — shop notes

• Repairability: 6/10
• Parts: good
• Common issues: Battery degradation; USB-C / charging port wear; Screen cracks from drops
• Full Galaxy S21 review · Repair pricing

Galaxy S7 — shop notes

• Repairability: 6/10
• Parts: fair
• Common issues: Battery degradation; USB-C / charging port wear; Screen cracks from drops
• Full Galaxy S7 review · Repair pricing

Generation gap

Galaxy S21 (2021) vs Galaxy S7 (2016) — 5 years apart. That usually means a meaningful chip bump and longer software support for the newer phone — but also higher used-market price.

Which should you buy used?

1. Check battery health (Settings → Battery and device care) before either model.
2. Ask about prior screen or back glass work — quality varies by shop.
3. Compare our repair prices for the exact failure you're worried about.

If you're cross-shopping within the same generation (e.g. Ultra vs Plus vs FE), repair costs often differ more than performance for typical users.

Repair cost & downtime (shop perspective)

| Factor | Galaxy S21 | Galaxy S7 | |--------|----------------|----------------| | Repairability | 6/10 | 6/10 | | Parts availability | good | fair | | Typical first shop visit | Battery degradation | Battery degradation |

These are qualitative scores from our Seattle benches — not Samsung specs. Higher repairability usually means lower labor surprise when something common breaks.

Software & resale runway

Galaxy S21 (2021) will generally outlast Galaxy S7 (2016) on One UI and security updates, but the used price gap often swallows that advantage. If both phones are already several years old, condition and repair history matter more than generation gap.

Who should pick which?

• Choose Galaxy S21 if you prioritize balanced Galaxy S features and accept similar or better repairability vs the alternative.
• Choose Galaxy S7 if you prioritize balanced Galaxy S features and the used price fits your budget after a realistic repair cushion.

We link full single-device reviews above when you want depth on one model only.