We have learned that Straight Talk would now begin allowing users to activate Verizon LTE based smartphones for use on their service, which is a good thing if you were looking for a new carrier ...

Since the activation process disables the old SIM, users are stuck without phone service until T-Mobile fixes the issue. ... Talk to us! Email our staff at news@androidauthority.com.

Activate your SIM card: If you have an eSIM, you can activate it during setup. If you have a physical SIM card, you may need to activate it by following the instructions provided by your carrier.

How you activate your O2 SIM will depend whether you are on a pay-monthly or pay-as-you-go deal. It will also depend on whether you’re already an O2 customer or are new to O2.