Hi, please help , I bought a new Apple Watch SE but I can’t setup cellular plan despite doing all steps required. Cellphone Carrier supports the service and both my iphone and Apple Watch are updated . I am residing in Saudi Arabia

Hi there Thuraya90,

It looks like you may be attempting to use a different carrier for your Apple Watch and iPhone, which will prevent activation:

Your iPhone and Apple Watch must use the same carrier, unless the watch was set up for a family member who doesn't have an iPhone. If you change carriers on your iPhone, you need to remove the previous service plan on your Apple Watch and sign up for a new plan.* Here's how:

1. On your iPhone, open the Apple Watch app. 

2. Tap the My Watch tab, then tap Cellular. 

3. Your Apple Watch should automatically switch to the carrier that your iPhone is using. If you need to add a new plan, tap Add a New Plan, then follow the onscreen steps. If your previous plan still appears in the Apple Watch app, you can remove it.

If you need help, contact your carrier. 

Leran more here: Set up cellular on Apple Watch

Keeping that information in mind, you'll want to reach out to your wireless carrier for more help.

Take care.