The speed of your internet connection to your Wi-Fi® gateway is pretty consistent. You can check it with AT&T Smart Home Manager.
However, the speed you get on devices connected to your network can vary. The number of devices you connect to Wi-Fi, how you use them, their age and type, and Wi-Fi signal strength all can affect speed.
Number of devices and activities
All connected devices share your home internet connection. Trying to do too much at the same time can slow your speed:
Using multiple devices
Device type and age
Wi-Fi devices connect to your home network using wireless radios and tech.
Newer PCs and devices are usually faster than those using older Wi-Fi tech.
Older devices or those with 1-2 radios (like smartphones and tablets) may not be able to reach faster speeds.
Wi-Fi signal strength
These conditions may weaken Wi-Fi and slow speed:
Devices being too far from the Wi-Fi gateway
Obstacles like walls, doors, or floors
Construction materials like concrete or rebar
Electrical appliances like microwaves and baby monitors