Several mobile service providers allow you to block the sender by forwarding unwanted texts to 7726 (or "SPAM").
You can block numbers from within your text messaging app, but the exact process depends on which app you use. If you can't find the option to block, you can install the Google Messages app and use that app instead. To block a message, select it and choose "Details" from the menu, then choose "Block & report spam."
Go to Settings > Messages, scroll down to Message Filtering, then turn on Filter Unknown Senders.
Blocking Someone on Android Messages and Apple iMessage
When you block a contact over Android or iPhone, they will still be able to send you text messages. These messages will not show up on your phone but the sender will see the messages as sent. They won't know that they've been blocked.
If you are getting spam texts, it's more than likely that whoever is sending you a spam text message is trying to get access to your personal information—bank accounts, passwords, social security number, online IDs and more. Spam texts don't come from another phone.
If an Android user has blocked you, Lavelle says, “your text messages will go through as usual; they just won't be delivered to the Android user.” It's the same as an iPhone, but without the “delivered” notification (or lack thereof) to clue you in.
If you send a message as a regular SMS in the green text bubble and you do not get a “Delivered” notification but instead get a notification similar to “Message not Delivered” or no message at all, that means you were probably blocked.
When you block a phone number or contact, they can still leave a voicemail, but you won't get a notification. Messages that are sent or received won't be delivered. Also, the contact won't get a notification that the call or message was blocked.
Only TextKiller gives you fully customizable text blocking to ensure you block spam texts on your terms.
If you've been blocked, the recipient will not receive a notification and won't be able to respond. If you don't receive a returned call or text message within a few days, there's a good chance you may be blocked.
When you call a number that has blocked yours, you may hear one or half a ring or no rings at all and then the call will go to voicemail. If it goes straight to voicemail, their phone may also be off or out of range, or they may have temporarily turned on Do Not Disturb mode to work, drive, or sleep.
Once someone blocked your number, you will not receive any phone calls or text messages from them.
The truth is that, yes, it's possible to get scammed by replying to a text message. Fraudsters send billions of fake text messages every month hoping that a small percentage of people will respond. And their scams are getting harder and harder to spot.
Go to Settings > Phone. Tap Call Blocking & Identification. Under Allow These Apps To Block Calls And Provide Caller ID, turn the app on or off. You can also reorder the apps based on priority.
When someone you've blocked tries to text you, you will not receive text messages from them. The blocked person also does not receive any notification that they're blocked. However, many iPhone users may be able to deduce that you've blocked them.
Blocked messages will not come through when unblocked.
While someone is blocked, any sent text messages will be blocked by Messages. You won't be able to retrieve them.
once you have blocked someone you can not call or text them and you can not receive any messages or calls from them either. you will have to unblock them to contact them.