Head to head
Galaxy S21 vs Galaxy S21 Ultra
Full specs side by side — plus the one table nobody else shows you: what each phone actually costs to repair.
At a glance
- Galaxy S21 Ultra has the larger display (6.8" vs 6.2").
- Galaxy S21 Ultra carries the bigger battery (5,000 mAh vs 4,000 mAh).
- Galaxy S21 is lighter (169 g vs 227 g).
- Galaxy S21 is cheaper to fix — screen replacement runs $159 vs $239 at our counter.
Specifications
Spec for spec.
| Galaxy S21 | Galaxy S21 Ultra | |
|---|---|---|
| Release date | 2021-01-29 | 2021-01-29 |
| Display | 6.2" Dynamic AMOLED 2X | 6.8" Dynamic AMOLED 2X |
| Resolution | 2400 x 1080 | 3200 x 1440 |
| Refresh rate | 120Hz | 120Hz |
| Chip | Snapdragon 888 (US) / Exynos 2100 (intl) | Snapdragon 888 (US) / Exynos 2100 (intl) |
| RAM | 8GB | 12 / 16GB |
| Storage options | 128GB / 256GB | 128GB / 256GB / 512GB |
| Rear cameras | 12MP wide + 12MP ultrawide + 64MP 3x hybrid tele | 108MP wide + 12MP ultrawide + 10MP 3x tele + 10MP 10x periscope |
| Front camera | 10MP | 40MP |
| Battery | 4000 mAh | 5000 mAh |
| Charging | USB-C, 25W wired, 15W wireless | USB-C, 25W wired, 15W wireless |
| Dimensions (mm) | 151.7 x 71.2 x 7.9 | 165.1 x 75.6 x 8.9 |
| Weight | 169 g | 227 g |
| Colors at launch | Phantom Gray, Phantom White, Phantom Violet, Phantom Pink | Phantom Black, Phantom Silver, Phantom Titanium (online), Phantom Navy (online), Phantom Brown (online) |
| Connectivity | 5G, Wi-Fi 6, Bluetooth 5.0, NFC | 5G, Wi-Fi 6E, Bluetooth 5.0, NFC, UWB |
| OS at launch | Android 11 (One UI 3.1) | Android 11 (One UI 3.1) |
| Water resistance | IP68 | IP68 |
| SIM | Nano-SIM + eSIM | Nano-SIM + eSIM |
Specs reflect the US models as published by the manufacturer.
What buyers pick
The configurations people actually choose.
Based on current used-market sales data, updated August 2026.
| Galaxy S21 | Galaxy S21 Ultra | |
|---|---|---|
| Most-chosen color | Gray | Black |
| Most-chosen storage | 128GB | 128GB |
Repair pricing
What each costs to fix.
Real walk-in prices at BK Wireless — every repair backed by a 60-day parts and labor warranty.
| Repair | Galaxy S21 | Galaxy S21 Ultra |
|---|---|---|
| Screen replacement | $159 | $239 |
| Battery replacement | $79 | $79 |
FAQ
Galaxy S21 vs Galaxy S21 Ultra, answered.
Which is newer, the Galaxy S21 or the Galaxy S21 Ultra?
Both launched in 2021.
Which has the bigger battery?
The Galaxy S21 Ultra: 5,000 mAh vs 4,000 mAh.
Which is cheaper to repair?
Screen replacement is $159 for the Galaxy S21 and $239 for the Galaxy S21 Ultra at BK Wireless — both with a 60-day parts and labor warranty.
Does BK Wireless repair the Galaxy S21 and the Galaxy S21 Ultra?
Yes — both. Walk into 1054 Beach 20th Street in Far Rockaway for same-day screen, battery, and charging port repairs on either phone, backed by a 60-day warranty. No appointment needed.
Can I trade in my old phone toward either one?
Yes. Bring your current phone and a photo ID — we test it in front of you and pay cash on the spot, working or broken.
Upgrading to either one?
Get cash for your current phone at 1054 Beach 20th Street — tested in front of you, paid on the spot.
Get cash todayAll device comparisons · Galaxy S21 repairs · Galaxy S21 Ultra repairs · Free IMEI check