Their phone is powered off. If you're blocked, you won't know. You have to call the person to find out. Their phone is powered off.
Turn off your Android's Do Not Disturb mode
If your phone is set to "Do Not Disturb," most or all of your phone calls will go directly to voicemail. So it's worth checking to see if the phone has been accidentally put in that mode.
If their phone is turned off, the message will only say sent. Once they turn their phone on, the message will be delivered to the handset.
Your iPhone typically goes straight to voicemail because your iPhone has no service, Do Not Disturb is turned on, or a Carrier Settings update is available.
Because iMessage constantly shuffles the 'delivered' or 'read' badge to the last message in the conversation that was delivered successfully, any messages sent after you'd been blocked would show up in the chat, but never see the 'delivered' badge.
Check iMessage delivery notification
Unless the other person has turned it on, you'll not get that tiny gray notification. If you don't see “Delivered” or “Read” notification appear within the iMessage conversation, then they may have blocked you.
Repeated redirects to voicemail after a single ring, or none at all, could be an indication your number is blocked. If you hear multiple rings before hearing the voicemail prompt, chances are the person has not blocked your calls but is just rejecting them.
Most obviously, you'll see a large dark grey notification on the lock screen. This will also tell you how long the mode will be on for. If there's room for it (the X- and 11-series handsets don't, because of the notch), a faint little crescent-moon icon will appear in the top bar on your iPhone or iPad's screen.
It may just mean the person is talking to someone else at the same time you're calling, has the phone off, or sent the call directly to voicemail. Try again later. If the one-ring and straight-to-voicemail pattern persists, it likely may be a case of a blocked number.
They'll be told the message was delivered. That does not equate to it having been read, just like if they sent you a message when the phone wasn't on DND and you didn't open messages and read it.
Calls from blocked phone numbers may go straight to voicemail, so check if any important contacts got accidentally added to the block list by firing up the Phone app and tapping 'More' (three-dot icon). Hit 'Settings' then select 'Blocked numbers. ' Tap the X next to the number to unblock, then hit 'Unblock.
Turn Airplane Mode on and off. Go to Settings and turn on Airplane Mode, wait five seconds, then turn it off. Check Do Not Disturb. Go to Settings > Focus > Do Not Disturb and make sure it's off.
If you suspect you have indeed been blocked, first try to send a courteous text of some kind. If you get the "Delivered" notification underneath it, you weren't blocked. If you get a notification like "Message Not Delivered" or you get no notification at all, that's a sign of a potential block.
Blocked phone calls go straight to voicemail
When someone you've blocked calls you, they'll be sent right to your voicemail, as if your phone was turned off. This is their only clue that you blocked them. The blocked caller can still leave a voicemail, but it won't show up with your regular messages.
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.
Look underneath the last text you sent before you suspect you were blocked. If the previous iMessage says "Delivered" under the message bubble but the most recent one doesn't, it can mean that you've been blocked. If you see an iMessage Not Delivered error instead, that can be another indication as well.
Blue or Green has nothing to do with being blocked. Blue means iMessage, i.e., messages sent through Apple, Green means messages sent through SMS. Do Not Disturb will not turn them to green as they are delivered but no sound or notification goes through while Do Not Disturb is on.
Check that Airplane Mode is disabled on your device. If it is disabled but your Android phone still can't make or receive calls, try enabling Airplane Mode and disable it after a couple of seconds. Disable Airplane Mode from Android Quick Settings drawer or navigate to Settings > Network & Internet > Airplane Mode.
Why Is My Android Phone Not Making Or Receiving Calls? You might be facing network issues, try moving to a different location to see if you get any signal elsewhere. It could also be a temporary software glitch, some network settings issue, your phone being on airplane mode or DND mode, some malware, etc.
There won't be any sound or vibration, your lock screen will stay dark, and incoming calls are sent directly to your voicemail. Do Not Disturb mode was introduced in September 2012 with the release of iOS 6.
If you're blocked, you would only hear a single ring before being diverted to voicemail. An unusual ring pattern doesn't necessarily mean your number is blocked. It may just mean the person is talking to someone else at the same time you're calling, has the phone off or sent the call directly to voicemail.
When Do Not Disturb is turned on, it sends incoming calls to voicemail and does not alert you about calls or text messages. It also silences all notifications, so you're not disturbed by the phone.