Activate SIM card Activate SIM card

To activate your Optimum Mobile SIM card, visit and then click on Activate SIM card. Tap Back to Overview. Your SIM Card will be activated in minutes.

Optimum Mobile provides access to the nation’s fastest, most dependable, and largest 5G network. Moreover, 5G connectivity is built into all plans at no extra cost.

How do I activate my SIM card?

Activate your Optimum Mobile SIM card as soon as you receive it.

1. Sign in to MyMobile

2. Tap or click Activate service


3. Tap or click the number you want to activate


4. Select Activate now


5. Tap Back to Overview. Your SIM Card will be activated in minutes.


What plans does Optimum Mobile offer?

Optimum Mobile offers a range of phone plans to suit different needs:

1) 1 GB Plan: Ideal for light data users.

2) 3 GB Plan: A step up for moderate data usage.

3) Unlimited Everything Plans:

  • 20 GB: Great for heavy data users.
  • 50 GB: Perfect for those who need even more data.

All plans include unlimited calls and texts, and they run on America’s largest 5G network. Feel free to explore and choose the one that fits you best! 😊

Setting up your service

The following information on how to set up your service and manage your account will help you to save time and data in the long run.

Enabling Wi-Fi Calling

You can make and receive calls via Wi-Fi even if your network is patchy or nonexistent; this feature is included at no extra cost. Wi-Fi calling can improve call quality and lessen the likelihood of dropped calls.

Saving data

Reduce your data usage even if you are on an unlimited plan.


With voicemail, you can access your messages and play them back.

Managing add-ons

You can buy an additional 1 GB of data at any time. To make calls abroad, pick the right travel pass for you. To talk and text from the US to an international destination, choose an International monthly add-on.

I already have a SIM card, what should I do?

If you have a SIM card from your previous carrier, you should remove it, discard your old SIM card and replace it with your Optimum Mobile one

If you upgrade your phone, you should remove the SIM card from your old device and insert it into the new one

Upon clicking Activate now, your Optimum Mobile service will be ready for use in approximately 10 minutes, after which you can insert the SIM card into your phone to use.