Why BoxPhone Only Works on Samsung

What BoxPhone Demands From a Device

Before answering why Samsung fits — you need to understand what capabilities a phone farm requires from each device:

1. Unlockable bootloader — to flash custom recovery, patch boot.img for Magisk, and run root + root-hiding
2. Persistent ADB authorization — after a reboot, no one should have to tap an “Allow USB debugging” popup on the device screen.
3. Stable ADB-over-network — keep adbd listening over Wi-Fi without leaving USB cables permanently attached.
4. Start-on-boot for the automation app — after a reboot the bot or launcher must come back up automatically, no human touch required.
5. No aggressive battery optimization killing ADB or automation background processes.
6. USB OTG / debug working concurrently — ADB must work while charging.
7. Reasonable used-market supply — phone farms run 50-200 units at a time and pricing has to make sense.

Why Samsung Fits Best

Samsung Galaxy S8 through S10 (and certain Note / Z Flip models) check almost every box:

• Bootloader unlocks via Odin — community documentation is exhaustive, and every firmware version has been dissected.
• ADB authorization can be made persistent with a small system patch (Sikrid built this in-house).
• Stable USB controller — runs reliably across many units on a hub.
• Durable battery health — supports 24/7 operation for years, even shelf-mounted.
• Strong Thai used-market supply — affordable prices, sufficient specs (Snapdragon 845 / Exynos 9810 and up).
• Documented kernel and drivers — community custom ROMs exist for every model.

Why Redmi / Xiaomi Don't Work

Redmi 12, 13C and newer Xiaomi models are simply off the table for BoxPhone — engineering reasons:

1. Bootloader unlock is slow and risks getting locked out

• Requires a 168-hour (one-week) wait after binding a Mi account before you can unlock — not practical for a 100+ unit farm.
• Since 2024-2025 Xiaomi has revoked unlock rights in many regions — EU/Global units are increasingly hard to unlock.
• Unlocking flags the Mi account — that account cannot be used elsewhere, and there's a 1 account = 3 devices/month cap.

2. MIUI / HyperOS aggressively kill background processes

• MIUI auto-kills adbd and background apps after 5-10 minutes of idle — even with autostart enabled.
• System-level battery optimizations cannot be fully disabled — you need root and pm commands.
• Start-on-boot on some models requires entering Settings on each device to flip a toggle — cannot be automated.

3. ADB persistence is fragile

• USB debugging on MIUI must be enabled via the hidden setting “USB debugging (Security settings)” — which some versions don't expose.
• After reboot, ADB authorization is lost on some models — requiring another tap on the screen.
• ADB-over-network shuts off when the screen turns off — fixing this requires root and scripting that Xiaomi does not support.

4. Redmi/Xiaomi simply isn't designed for phone farms

This is the key point — Redmi/Xiaomi are designed as consumer devices for individual users, not for running automation 24 hours a day.

When you see vendors selling “Redmi BoxPhones” — that is marketing from people trying to move inventory. Run 50+ units in production for a month and you will hit:

• Devices drop ADB every few hours, requiring manual resets
• After a power outage and auto-boot, the bot doesn't restart — you must tap each device
• Batteries swell quickly because thermal management is not designed for 24/7
• MIUI OTA updates can wipe root every month

Oppo / Vivo / Realme — Same Problems, Worse

• Oppo / Realme ColorOS — bootloader unlock has been completely shut off since 2022 on Global units. Engineering firmware is required and unavailable.
• Vivo / iQOO Funtouch / OriginOS — bootloaders are difficult to unlock and ADB persistence is the worst on the market.
• Huawei / Honor — no Google services, plus Huawei revoked bootloader unlock entirely in 2018.
• Tecno / Infinix / itel — driver and kernel quality is not stable enough for 24/7 workloads.

Summary — Why Samsung Only

Conclusion

Sikrid BoxPhone uses Samsung Galaxy S8 / S9 / S10 / Note / Z Flip because they meet every requirement of a real phone farm.

Redmi, Xiaomi, Oppo, and Vivo aren't a matter of choosing or not choosing — they are engineering-impossible. Anyone claiming otherwise has not run a real farm.

If someone tries to sell you a Redmi-based BoxPhone, ask one question: “Run 100 units continuously for 30 days — how many lose ADB?” The answer will tell you everything.

FAQ

Further Reading

• What Is BoxPhone
• Hide Root on BoxPhone 2026
• BoxPhone vs Device Farm
• Setting Up a 50-100 Device BoxPhone Farm