Text messages can get blocked due to various reasons. One common reason is that the recipient's phone or messaging app may have blocked the sender's number. This can happen if the recipient has reported the sender's number as spam or if the sender has sent too many messages in a short period. Additionally, text messages can also get blocked by mobile network operators or internet service providers (ISPs) due to technical issues or spam filtering.
Apple’s iOS keeps a centralized list of blocked numbers and emails. unblocking text messages
No. The person you unblocked receives no notification. They will only know if: Text messages can get blocked due to various reasons