If there is one gray check mark in WhatsApp, - briefly?
If you see a single gray check mark next to your message in WhatsApp, it means that the message has been successfully sent from your device but has not yet been delivered to the recipient's phone.
If there is one gray check mark in WhatsApp, - in detail?
If you see a single gray check mark next to your message in WhatsApp, it indicates that the message has been successfully sent from your device but has not yet been delivered to the recipient's phone. This status is represented by a small gray check icon alongside your message bubble. It serves as an initial confirmation that your message has left your device and is currently traveling through WhatsApp's servers towards its intended destination.
However, it does not guarantee that the message will be successfully delivered or read by the recipient. Several factors could affect delivery, including network connectivity issues, the recipient's phone being turned off or in airplane mode, or the recipient having their WhatsApp settings configured to block messages from unknown numbers or specific contacts.
Once the message is successfully delivered to the recipient's device, the gray check mark will turn blue, indicating that your message has reached its destination. If you do not see this change, it might be beneficial to check your internet connection or wait for a while before attempting to resend the message.