Verizon (and the Samsung Messages app used on many Verizon phones) marks incoming texts that it suspects are spam, phishing, or scams with a solid yellow background. The message is not "blocked" in the traditional sense (you still received it), but it is quarantined and flagged for your safety.
A: No – military deployment exceptions exist, but otherwise Verizon strictly enforces the 60-day policy. verizon unblocking key
If you still have the original plastic card the SIM was attached to, the PUK is often printed there alongside the default PIN. Verizon (and the Samsung Messages app used on
If you see websites selling Verizon unlock codes for a fee, : verizon unblocking key