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Guides & Help Center

Setup guidance for Windows USB and independent Android OTG, with troubleshooting.

Windows uses ADB over USB to mirror and control a phone. The independent Android app connects an OTG keyboard and mouse directly, without a PC. Both apps share the website account and server-verified Pro entitlement; Windows Pro requires online capability renewal.

No matching guides or FAQs found. Contact our team below for direct assistance.
DEVICE BRAND CONFIGURATION

Brand-Specific Setup (100% Verified)

Select your phone manufacturer to view exact, foolproof system steps:
Xiaomi · Redmi · POCO (MIUI & HyperOS)
1
Step 1: Unlock Developer Options

Go to Settings > About Phone. Tap 'OS Version' (HyperOS) or 'MIUI Version' (MIUI) continuously 7 times until the notification 'You are now a developer' appears.

2
Step 2: Enable 2 Required Debugging Toggles

Go to Settings > Additional Settings > Developer Options.
1. Toggle ON USB Debugging.
2. Toggle ON USB Debugging (Security settings).

3
Step 3: Eliminate Input Lag (Optional Optimization)

Scroll to the bottom of Developer Options. Turn OFF Turn on MIUI / HyperOS optimization if input feels delayed or lagging.

Note on Xiaomi Security Toggle: Xiaomi strictly requires an active SIM card installed and an active Mi Account login to toggle 'USB Debugging (Security settings)'. You will be prompted to wait 5 seconds and confirm 3 times to authorize touch emulation.
Samsung Galaxy (One UI)
1
Step 1: Unlock Developer Options

Open Settings > About Phone > Software Information. Tap Build Number 7 times continuously until Developer Options is enabled. Enter your PIN or pattern if prompted.

2
Step 2: Enable USB Debugging

Return to Settings > Developer Options. Toggle ON USB Debugging and tap OK on the prompt.

3
Step 3: Select USB Transfer Mode

Plug the USB cable into your PC. On your Samsung phone, pull down the notification shade and select Transferring Files / Android Auto (MTP). Check 'Always allow from this computer' on the debugging prompt.

OPPO · Realme · OnePlus (ColorOS & Realme UI)
1
Step 1: Unlock Developer Options

Open Settings > About Device > Version. Tap Build Number 7 times continuously.

2
Step 2: Enable USB Debugging

Go to Settings > System Settings (or Additional Settings) > Developer Options. Toggle ON USB Debugging.

3
Step 3: CRITICAL: Enable OTG Connection

Go to Settings > System Settings (or Additional Settings). Toggle ON OTG Connection. If not enabled, OPPO and Realme will automatically terminate external USB communication after 10 minutes.

Vivo · iQOO (Funtouch OS & OriginOS)
1
Step 1: Unlock Developer Options

Open Settings > System Management (or About Phone) > Software Information. Tap Software Version 7 times continuously.

2
Step 2: Enable USB Debugging & Input Simulation

Go to Settings > Developer Options. Toggle ON USB Debugging and toggle ON USB Input / Simulated Input to allow mouse control.

3
Step 3: Disable Background Battery Restriction

Go to Settings > Battery > Background Power Consumption Management. Find CastKey and choose 'Don't restrict background power usage' to prevent system kills during gameplay.

UNIVERSAL WORKFLOW

3 Simple Steps to Connect & Play

01
Connect USB Cable

Plug a high-speed data transfer cable from your phone into your PC. Rear motherboard USB 3.0 ports are recommended for optimal stability.

02
Enable USB Debugging

On your Android device, open Settings > Developer Options and toggle USB Debugging ON. Check 'Always allow from this computer' on prompt.

03
Launch CastKey & Play

Open CastKey on Windows. Your device connects automatically with 1000Hz polling rate and ultra-low input latency ready for gaming.

FREQUENTLY ASKED QUESTIONS

Troubleshooting & Key Solutions

Device not detected when plugged into PC via USB?
1. Verify Cable: Ensure your USB cable supports high-speed data transfer (charging-only cables cannot bridge data).
2. Switch Ports: Plug directly into rear motherboard USB 3.0 ports rather than loose front-panel hubs.
3. Allow Authorization: Unlock your phone screen, select File Transfer (MTP) mode, and tap Allow on the USB debugging prompt.
Is playing with CastKey safe from account bans?
100% Safe and Undetected. CastKey operates purely via hardware touch simulation over USB. It involves zero APK modifications, zero RAM memory hooks, and zero code injection. You match exclusively with regular mobile phone players in official server queues.
How do I open and customize the in-game keymap HUD?
1. Press F1 (or F12) on your keyboard anytime in match or training grounds to toggle the keymap overlay.
2. Drag and drop aim locks, triggers, and skills to match your game layout.
3. Click Save and press F1 again to lock your cursor and shoot with precision.
Can low-end office PCs or student laptops run CastKey?
Runs effortlessly on any PC. Unlike heavy emulators that consume 4GB - 8GB RAM, CastKey only mirrors display and routes mouse/keyboard input while your phone handles 3D game processing. PC RAM usage is only ~80MB, running at 60 - 120 FPS smoothly even on older Core i3 laptops with integrated graphics.
DIRECT SUPPORT

Need 1-on-1 Technical Assistance?

Our dedicated support team is ready 24/7 to help resolve USB connection issues, custom game mappings, and driver configuration.

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