OnePlus
Send an SMS Message auf OnePlus
An SMS is a plain text message without photos, videos, or other attachments. On a OnePlus phone, sending one always goes through the Messages app, which is also responsible for chat features like read receipts or grouped media. This dual role is why some people expect an SMS option somewhere else and cannot find it.
To send one, open Open the Messages app ➔ Choose a conversation or tap on New message ➔ Choose a contact or type a phone number ➔ Type in a message ➔ Tap on Send. No other setting needs to be changed for a basic text.
When to look elsewhere
If you actually want to send photos, videos, or longer group chats, that falls under chat or RCS messaging, not plain SMS. Those messages use mobile data or Wi-Fi instead of your carrier's text network, and they behave differently if the recipient does not support the same feature.
A side effect of plain SMS is the lack of delivery confirmation on many carriers, unlike chat-based messages which often show read status. If a text seems stuck, checking your signal or carrier settings is usually more useful than restarting the Messages app.