You can tell if someone blocked your text messages on Android by checking for missing delivery indicators and testing with a call. If your messages consistently lack a "Delivered" status and a call goes straight to voicemail after one ring, it is a strong sign that the recipient has blocked your SMS.
Check your own block list for blocked text messages Android
It is easy to accidentally block a contact yourself, which would prevent your messages from reaching them. Before investigating someone else, check your own block list to rule this out. This step saves time and avoids unnecessary confusion, because you want to make sure you haven't inadvertently blocked the other person.
- Open Google Messages, tap your profile photo, then "Messages settings," then "Blocked contacts" or "Spam & blocked."
- In Samsung Messages, open the app, tap More options (three dots), then "Settings," then "Block numbers and spam," then "Block numbers."
If the contact's number appears in either list, unblock them first. If it does not, proceed with the tests below.
Understand what 'Message Blocking is Active' really means
If you see the error "Message Blocking is Active," it typically indicates a problem on your end, such as a carrier issue with your account (e.g., an overdue bill or SMS functionality disabled), not that the recipient has blocked you. This is important to know because it tells you the issue is with your own service, not the other person's choice. Understanding what 'Message Blocking is Active' really means helps you avoid wasting time blaming the wrong party.
Look for missing delivery indicators in RCS chats
RCS (Rich Communication Services) chats in Google Messages show a "Delivered" or "Read" status below each message. If you are using RCS with a contact and those indicators stop appearing, your messages remain on "Sent" or "Sending" without ever showing "Delivered", it can be a sign of being blocked. This is different from SMS, where delivery receipts are not always available. Look for missing delivery indicators in RCS chats because a sudden loss of these statuses is one of the clearest visual cues.
Send a test SMS message
To confirm a block, send a standard SMS (not an RCS message) to the contact. Open your messaging app, compose a simple text, and send it. Watch the message status closely. If it stays on "Sending" for a long time or never shows "Delivered," and you receive no reply, it suggests a block. Send a test SMS message because observing if it remains on 'Sending' or never receives a response is a direct way to test delivery.
Call the contact to test for a block
Place a phone call to the suspected contact. Pay attention to how the call behaves. A strong indicator of a block is when the call rings once (or not at all) and then immediately goes to voicemail. This pattern is different from a phone that is turned off or in airplane mode, which typically rings several times or gives a different error. Call the contact to test for a block because the calling method, detailing the pattern of one ring followed by voicemail, is a reliable secondary confirmation.
Create a group chat with a mutual friend
Start a group chat that includes the suspected contact and a mutual friend. Send a message to the group. If the mutual friend receives the message and replies, but the suspected contact never sees or responds to it, this is a strong sign that you are blocked. Create a group chat with a mutual friend because this test allows you to see if messages are delivered to others but not the suspected contact, isolating the issue.
Try a different messaging app
Install a third-party messaging app like WhatsApp or Signal and send a message to the contact through that app. Try a different messaging app because using a third-party app like WhatsApp or Signal to see if communication is possible there provides a clear distinction between an SMS-specific block and a general one.
