There’s 4 dots in my service area next to the Wi-Fi symbol on my iPhone.

Are you referring to the following from Status icons and symbols on your iPhone - Apple Support

On your iPhone with Dual SIM capability, you’re in range of your cellular network and can make and receive calls. If there’s no signal, "No service" appears.

Just to be sure, does what you see look like anything in the following support article?

• Status icons and symbols on your iPhone - Apple Support