LTE connectivity issues

Have you worked with your carrier to ensure that you have a plan with your carrier for the watch? The Apple watch requires a wireless service plan from your carrier to be able to operate on LTE, and the carrier has to support the Apple Watch.

Hi

Follow the instructions here, including contacting your carrier for assistance if necessary:

Set up and use cellular on Apple Watch Series 3 (GPS + Cellular) - Apple Support

Okay, what other troubleshooting have you done? Try powering the iPhone and Apple Watch off, and then back on. Power the phone back on first. If there are any problems with pairing, see this. Set up your Apple Watch - Apple Support

I did a hard reset on my watch and I turned off my iPhone and then turned it back on. I also turned cellular off on the watch and then back on. That seemed to help with cellular service. I still think there’s something else going on that hopefully Apple will address.

No, just powering off and on. That should not affect pairing, but if it did, then I provided you with the instructions. At this point it is not necessary to reset the watch. Powering the devices off/on may be enough to take care of it.

My watch has similar issues. I have AT&T and the watch shows connected to my plan. The watch however fails to connect to LTE a good bit of the time. Sometimes it connects with very poor service and then disconnects. I’ve reached out to Apple about this and I know what they are going to say. Unpair watch and set it up again. If the watch worked as intended it would be great. Maybe Apple needs to push out another software update because 4.0.1 didn’t help.

I'm on my 3rd replacement Series 3 watch from Apple at this point. I'm consistently getting no bars or at most half the bars that I get on my iPhone 7+. Most the time, my watch shows no connection even when I'm able to send and receive calls on my phone. I am able to make calls at my house all day long, but I can't make or receive calls on my watch at my house. It only shows no connection. When I have full bars and LTE on my phone, I will typically see 1 to 2 bars on my watch, but never more than this so far. I've driven around quite a bit on all 3 watches testing this out. It's easily duplicated and an issue on all 3 of the ones Apple has sent me. The biggest issue now is that I can't return the watch to the retailer where I bought it because the serial number doesn't match the one I purchased because Apple had me send that one back to get a replacement. My carrier is Verizon and they blamed the device.

In troubleshooting with Apple and Verizon, I've reset my watches no less than 10 times now. Sometimes, I end up restoring from backup, other times I've setup as a new watch. I've even restored my phone once during this entire process. Unfortunately, none of those things seemed to improve anything on my end.

My watch connected to LTE almost immediately this morning. As soon as I left WiFi range the watch connected. Hopefully the steps I took yesterday to fix my issues will fix the watch permanently.