Your connection strength can be affected by how busy your network is.NOTE: It may take a few minutes for your internet connection to be restored while the modem fetches all of its information from your Internet Service Provider (ISP). Disconnect your router and modem for 60 seconds from the power outlet, then reconnect them to the outlet.

For reference, here is a list of platform-specific troubleshooting guides:

Perform a network connection test for your console.

Wireless signals (Wi-Fi) can often experience interference and the signal quality can drop over time.

(Xbox and PlayStation only) Make sure that your console is connected to your router directly using an Ethernet cable.

Verify that other devices on your network can connect to the internet.

NOTE: If you are experiencing an 'EFEAB30C' or '4B538E50' error code which prevents you from accessing any or all NBA 2K online features, please refer to this article: If you are experiencing disconnections or performance issues (lag) or other error messages when connecting or playing online modes in NBA 2K titles, please refer to the connection troubleshooting below:

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