Samsung · phone · launched in India January 2021
Test your app on a real Galaxy S21
Book a 99tests run, set the Galaxy S21 as a target device, and testers who own one run your test cases on it, on their own SIM and network. Every finding comes with the device, OS build and network it happened on.
Testers with a Galaxy S21
Limited
Fewer active testers own a Galaxy S21. Pick it as a target device when you book; if no one can take a session, it's credited back to you automatically.
Based on active testers' registered devices, October 2026.
The Galaxy S21 at a glance
| Launched in India | January 2021 |
|---|---|
| Launch price | ₹69,999 (8GB/128GB) |
| Screen | 6.2-inch 120 Hz Dynamic AMOLED 2X, 1080 × 2400 |
| Chipset | Samsung Exynos 2100 |
| RAM | 8 GB |
| Software at launch | Android 11, One UI 3.1 |
| Unlock | In-display fingerprint, face unlock |
| Network | 5G |
| Battery | 4,000 mAh |
India model uses Samsung's Exynos 2100; US and China units use the Snapdragon 888.
Specs from news.samsung.com · m.gsmarena.com · themobileindian.com.
Where apps break on the Galaxy S21
Sleeping apps
One UI puts apps it sees as unused to sleep, and apps on the Deep sleeping list get no background work or notifications. Check notifications after the app has sat unused, and again with it added to Deep sleeping apps under Battery, Background usage limits.
120 Hz screen
Scrolling and animations that look smooth at 60 Hz can stutter at a higher refresh rate. Check long lists, carousels and screen transitions.
In-display fingerprint
Check your biometric login prompt, a failed or wet-finger scan, and the fall back to PIN or MPIN.
5G, 4G and Wi-Fi switching
Check what happens when the phone moves between 5G, 4G and Wi-Fi in the middle of a payment or an upload: no duplicate orders, and a clear message if it fails.
Offline and poor network handling test cases · Payment gateway checkout (cards, net banking, wallets) test cases
Launched with Android 11
If the tester hasn't updated past Android 11, apps get notifications without the Android 13 permission prompt, and photo picking uses the older storage permission. Check both paths.
Runtime permissions test cases · Push notifications test cases
OTP autofill
Check SMS OTP auto-read and the consent prompt, a late OTP, and a dual-SIM phone where the SMS lands on the other SIM. Check resend, expiry and a wrong code too.
From payment to report
- Minute 0Pay
Choose a package and pay by card. The invoice is issued at checkout.
- Minute 2Submit
Your build link or web address, your test cases in any format, and the Galaxy S21 as a target device.
- Hour 1Dispatch
Offers go to testers who own this phone. The first to accept takes the session.
- Day 1–2Sessions
Timed sessions on the real device. Findings are recorded as they happen, with screenshots or recordings.
- Day 3Verify and deliver
Findings are checked, merged and graded, then the report is emailed as a page and a PDF (day 5 for Deep).
Testing on the Galaxy S21
Can I test my app on a Galaxy S21 with 99tests?
Yes. When you book, set the Galaxy S21 as a target device. Fewer active testers own a Galaxy S21. Pick it as a target device when you book; if no one can take a session, it's credited back to you automatically. Testers use their own phones on their own Jio, Airtel or Vi connections.
Do you test on a real Galaxy S21 or an emulator?
A real one: a tester's own Galaxy S21, on their own SIM and network. Battery limits in One UI, SMS OTP auto-read and switches to UPI apps don't behave the same on an emulator or a stock-Android device cloud.
Which Android version will the Galaxy S21 be on?
Testers use their own phones with the updates they've installed. The Galaxy S21 launched with Android 11 and One UI 3.1. Every finding in the report records the exact device, OS build and network.
How much does a test run cost?
Fixed packages from ₹9,999 + GST ($129) for 5 × 45-minute sessions on 2 phones or browsers, with a verified report in 3 business days. You can mix the Galaxy S21 with other devices in one run.
Do you write my test cases?
No. Bring your own in any format: CSV, Excel, Google Sheets, Word, Markdown, plain text, TestRail or Jira. Or start from the free test case library, which has ready cases for logins, OTPs, UPI, checkout and more.
More Samsung devices testers own
Run your test cases on a Galaxy S21
Upload your build and test cases, and pick the Galaxy S21 alongside other phones or browsers: 2 devices in Starter, up to 6 in Deep. Fixed price from ₹9,999 + GST ($129), verified report in 3 business days.