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Recent Test History

Date & Time	Duration	Avg Ping	Avg Jitter	Packet Loss	Actions

Clash of Clans Ping & Packet Loss Test

Dropping your Archer Queen and suddenly getting the red Wi-Fi symbol? Losing crucial Clan War attacks to random disconnects?

Clash of Clans uses a strict, server-authoritative netcode running at roughly 20Hz. To prevent cheating and "airplane mode" exploits during attacks, Supercell servers demand a constant, uninterrupted stream of ~100-byte UDP packets from your phone. If your Wi-Fi or cellular signal drops packets for even a few seconds during a 3-minute attack, the server instantly terminates your session. Standard speed tests completely fail to catch this because they only measure raw TCP download speed, not connection stability. Our tool simulates exact 20Hz Supercell traffic to expose the hidden micro-drops causing your "Out of sync" errors.

20 Hz one update every 50.0 ms

What this test sends: 20 packets per second of 40 bytes, matching Clash of Clans rather than a generic ping. estimated

Supercell publishes no tick rate. Raids are deterministic replays of commands, not a position stream; 20 Hz is the figure the page has always stated.

How to Read the Clash of Clans Network Graph

Run the 20Hz test above for at least 60 seconds. Here is what your results mean for Clash of Clans:

Red Lines (Packet Loss)

Red vertical lines mean your connection dropped data entirely. In CoC, this directly triggers the flashing red Wi-Fi icon. If the packet loss lasts longer than a few seconds, you will receive the "Connection lost" or "Client and server are out of sync" error, instantly ending your attack and costing you trophies.

High Jitter (Stability)

Jitter is ping fluctuation. If your ping rapidly bounces from 30ms to 150ms, you will experience troop drop delay. You will tap the screen to deploy a Freeze Spell or Wall Wrecker, but it will spawn a full second late, ruining your funnel or letting your troops die.

High Ping (Latency)

While CoC is not a fast-paced shooter, a high baseline ping will still cause frustrating UI delays. You will experience long "clouding" times when searching for multiplayer bases, and collecting resources or upgrading buildings will feel sluggish and unresponsive.

How to Fix CoC Disconnects & Out of Sync Errors

If the tool above shows packet loss or high jitter, try these specific fixes.

1. Disable Wi-Fi Assist / Smart Switch

The Symptom: You get disconnected in the middle of a Clan War attack, even though your home internet is fine.

Smartphones actively try to swap between Wi-Fi and 4G/5G when your Wi-Fi signal fluctuates (like walking to another room). During this swap, your phone's IP address changes, instantly terminating your connection to the Supercell server.

Fix Go to your phone settings. On iOS, turn off Wi-Fi Assist. On Android, turn off Switch to mobile data. Force your device to commit to a single connection while attacking.

2. Use 5GHz Wi-Fi

The Symptom: The red Wi-Fi icon flashes when you are using Bluetooth headphones.

The standard 2.4GHz Wi-Fi band shares the exact same radio frequency as Bluetooth devices and microwaves. This causes massive radio interference, dropping the UDP packets that CoC needs to validate your troop deployments.

Fix Log into your router and connect your phone specifically to the 5GHz Wi-Fi band. Avoid using Bluetooth devices if you are forced to play on 2.4GHz.

3. Stop Background App Refreshing

The Symptom: "Client and server are out of sync" error pops up randomly.

If an app like WhatsApp or an OS update starts downloading in the background, it can choke your phone's network antenna. Additionally, swiping down your notification center mid-attack can suspend the game's network access on iOS.

Fix Disable Background App Refresh in your phone settings. Never swipe out of the app or pull down your notification tray during a live attack.

4. DNS & ISP Routing to AWS

The Symptom: Endless clouding or the game gets stuck on the loading screen.

Supercell hosts its servers on Amazon Web Services (AWS). Sometimes your ISP's default DNS struggles to resolve the CoC login servers quickly.

Action Change your phone's DNS to Cloudflare (1.1.1.1) or Google (8.8.8.8) in your Wi-Fi settings to speed up server handshakes and reduce endless clouding.

Frequently Asked Questions

Why do I get the "Client and server are out of sync" error?

This error occurs when your local game state disagrees with the Supercell server. It is usually caused by packet loss. If your phone tells the server you dropped a Rage Spell, but the data packet gets dropped by your Wi-Fi, the server doesn't spawn the spell. When your phone and the server compare notes seconds later, they are out of sync, and the server kicks you to prevent exploits.

What does the flashing red Wi-Fi symbol mean in Clash of Clans?

The red Wi-Fi icon is Supercell's warning that your device is experiencing severe packet loss or high ping. Your phone has temporarily stopped sending or receiving data from the battle server. If the connection is not re-established within a few seconds, the attack will end.

Why did I lose my Clan War attack when I disconnected?

To prevent players from cheating (such as turning on airplane mode when an attack goes badly to cancel it), Supercell servers are designed to immediately process the attack up to the exact millisecond you disconnected. Whatever troops were already deployed will finish their logic, but you cannot rejoin to deploy more.

Why did my troops or spells deploy late?

Troop drop delay is caused by high jitter or ping spikes. When you tap the screen, your phone must send a packet to the 20Hz server, and the server must reply with an approval packet before the troop actually spawns on your screen. If your internet is congested, this round-trip takes too long.

Test a Related Game

See the tick rate and packet size of all 566 supported games →

How this test measures, and what the numbers mean →