How to write and send a message on Android

Modern operating system-based smartphones Android have turned into universal communication centers, where sending text messages remains one of the basic but critical functions. Despite the abundance of messengers like Telegram or WhatsApp, classic SMS and MMS continue to be used for verification, official notifications from banks and communication with subscribers who do not have access to the Internet. Understanding the principles of operation of the standard Messages application is necessary for every user to avoid losing important data or financial losses when sending to paid numbers.

The process of creating and sending a message is intuitive, but the interface may vary significantly depending on the device manufacturer and shell version. Whether it’s a pure one Google Pixel with an application Messages or a smartphone from Samsung with the proprietary One UI interface, the logic of actions remains the same: select a contact, enter text and confirm sending. However, there are nuances regarding group mailings, attachment of media files and delivery settings, which often raise questions among beginners.

In this article we will analyze in detail the entire cycle of working with text messages: from typing the first character to solving delivery problems. We will touch on security issues, features of sending international messages and the difference between regular SMS and advanced chats RCS. You will learn how to effectively manage conversations and what settings you should check if the message does not go away.

Launch the application and select a contact

The first step to send a message is to launch the appropriate application. On most devices it is called “Messages”, “SMS” or Messages and has an icon in the form of a white bubble on a colored background. You can find it on the main screen or in the general list of applications, called up by swiping up. If you use several SIM cards, the system may prompt you to choose which one to send the message with, if this is not configured by default.

After opening the application, you will see a list of previous dialogs. To start a new conversation, you need to click on the special create button, which is usually located in the lower right corner of the screen and looks like a pencil, a plus sign, or a bubble with a spark. Clicking this button opens an input field where the system will prompt you to select a recipient from the address book or enter a number manually.

When you enter a number or contact name, the system automatically searches the phone database. If the number is saved in a format without a country code, and you are trying to send a message abroad, add the code +7 or other appropriate prefix. This is critical for international routing. After selecting a recipient, the focus automatically moves to the text input field, ready for you to type a message.

• 📱 Use the Contacts button to quickly select from a saved phone book so you don't misspell the numbers.
• 🔢 When entering manually, make sure there are no extra spaces or parentheses that may interfere with number recognition.
• 👥 To create a group chat, select several contacts immediately after clicking the create new message button.

Typing and formatting a message

The main input field supports not only plain text, but also various formatting elements depending on the version of the keyboard and application. Standard SMS is limited to 160 characters in one part of the message (when using the Latin alphabet) or 70 characters (when using the Cyrillic alphabet). If you exceed this limit, the message is automatically split into several parts, but appears to the recipient as a single text if their device and carrier support the concatenation feature.

Modern keyboards, such as Gboard or SwiftKeyoffer auto-correction and predictive typing features that make typing faster. However, you should be careful: sometimes autocorrect can distort the meaning of an important message, especially if you use specific terms or proper names. Before sending, always quickly re-read the text you typed to make sure it is correct.

If you plan to send a long message, keep in mind that if you exceed a certain number of characters, the tariff may change. Some operators count each segmented message separately. To save money in such cases, it is more advisable to use Internet instant messengers if the recipient has access to the network. The input field also has buttons for adding emoji, stickers and GIF animations, which make correspondence more expressive.

To insert frequently used phrases or templates, you can use the “Quick Text” function or "AutoCorrect" in the keyboard settings. This allows you to insert entire sentences with one tap, which is especially useful when answering standard questions or confirming appointments. However, do not overuse templates in personal correspondence so that communication does not seem soulless.

Sending multimedia and MMS messages

When it is necessary to send not only text, but also a photograph, video or audio file, technology is used MMS (Multimedia Messaging Service). To add media to a message, click the paperclip, camera, or plus icon next to the text input field. A selection menu will open where you can take a new photo, select an image from the gallery, or find a file in the device memory.

Telecom operators charge MMS traffic separately or charge a fixed fee for each message. Before sending, make sure that your mobile network settings allow data transfer, otherwise the message will be stuck in the “Sending” status.

There are restrictions on the size of attachments, which vary depending on the telecom operator and phone model. Typically the limit is from 300 KB to 1 MB. If you try to send a high-definition video, the system will automatically compress it to acceptable sizes, which can significantly degrade the quality of the picture. To transfer large files, it is better to use cloud storage or instant messengers.

Message type	Network requirements	Size limit	Tariffing
SMS	Cellular communications	160 characters (lats)	According to the operator's tariff
MMS	mobile data	up to 1 MB (depending on the operator)	Fixed or traffic
RCS (Chat)	Wi-Fi or Mobile. Internet	up to 100 MB	Internet traffic consumption

When sending an MMS, a thumbnail of the attached file appears in the message field. You can add a text comment to it or remove the attachment before final sending by clicking on the cross on the preview. Some applications allow you to edit photos directly in the sending interface: crop, apply filters or draw on top of the image.

Using the RCS and Chats function

Technology RCS (Rich Communication Services), often referred to simply as “Chats” in the application Google Messages, represents the evolution of classic SMS. It allows you to exchange messages over the Internet with support for typing indication, reading statuses and transfer of high quality files without the compression inherent in MMS. To use this feature, both participants in the conversation must have an Internet connection and supporting devices.

RCS is activated automatically in the settings of the messaging application, if the telecom operator and region support this technology. In the input field, you will see a prompt “Chat” instead of “Message” if the contact is also connected to the service. This switches the operating mode from a cellular network protocol to an Internet protocol, similar to what popular instant messengers use, but without the need to install a separate application.

⚠️ Attention: If you change your phone or SIM card, the RCS function may be temporarily disabled until the number is re-verified. At this point, messages can arrive as regular SMS.

The advantage of RCS is the ability to create group chats, assigning them names and adding participants on the fly, which is not possible in classic group SMS. In addition, you can send high-quality voice messages and share your location in real time directly from the conversation interface.

What to do if RCS does not turn on?

Make sure that data transfer is allowed in your mobile network settings. Try clearing the cache of the Messages app and Google Play Services. If the problem persists, contact your telecom operator to confirm RCS support on your tariff.

Delivery setup and read confirmation

To monitor the sending of messages, delivery reports are provided in the application settings. This feature lets you know if a message was successfully delivered to the recipient's device. In the case of RCS, read receipts are also available, which show when a subscriber opened a conversation with your message. These settings are located in the "Settings" → "Chats" or "Settings" → "Advanced" section.

Enabling delivery reports does not guarantee that you will see the status for all contacts. The “Delivered” status depends on the operator’s network and the state of the recipient’s phone (is it turned on, is there a signal). The Read status is only shown if the recipient is also using a compatible app and has not turned off read receipts in their privacy settings.

Some users choose to turn off these features for the sake of privacy, so that others don't know when they've read messages. These parameters are controlled via switches in the settings menu. It's worth noting that turning off read receipts works both ways: you won't see when your messages are read, and others won't see when you read.

• ✅ The "Sent" report means that the message left your phone.
• 📬 The "Delivered" report means that the message was accepted by the recipient's carrier network.
• 👁️ The “Read” report is available only in RCS/Chat mode with mutual agreement.

Solving problems with sending messages

The situation when a message is not sent and hangs with the status “Sending..” or “Error” can arise for a number of reasons. The most common problem is the lack of a stable cellular signal or failures in the operator’s network. Check the signal indicator at the top of the screen: if there is a cross or a “No network” icon, try moving to an area of ​​better reception or turning airplane mode on and off.

Another common reason is the phone's memory is full. Free space in the device's internal memory is required to save incoming and outgoing messages. If the memory is full, the system will not be able to record the fact that a copy of the message was sent or saved. Clearing the application cache or deleting old conversations with heavy attachments often solves this problem.

Settings → Applications → Messages → Storage → Clear cache

It is also worth checking your message center (SMSC) settings, although in modern smartphones they are usually updated automatically when you insert a SIM card. An incorrect message center number may block all outgoing correspondence. If simple methods do not help, try removing the SIM card, wiping the contacts and inserting it back, or check your account balance, since with a zero balance, sending paid SMS is impossible.

⚠️ Attention: Settings interfaces and menu item names may differ on smartphones from different manufacturers (Xiaomi, Samsung, Huawei). If you do not find the described item, use the search in the phone settings.

In rare cases, the problem may lie in a software failure of the messages application itself. Try updating the app through the store Google Play or temporarily installing an alternative SMS app to see if the problem persists. If the message is not sent only to certain numbers (for example, short service numbers), you may have accidentally blocked them or activated parental controls.

Security and spam blocking

Modern Android messaging apps come with built-in spam filters that automatically detect and hide suspicious messages from unknown senders. The system analyzes a database of known fraudulent numbers and alerts the user if the message is potentially dangerous. However, the user should remain vigilant and not click on links from messages from unknown persons.

For additional protection, you can manually block an unwanted number. To do this, open a dialogue with the sender, click on the three dots in the upper corner of the menu and select “Block number” or “Add to spam.” After this, messages from this subscriber will stop arriving, and you will not receive any notifications about them. Blocked messages can be viewed in a separate “Spam and Blocked” folder.

Never share confirmation codes from SMS with strangers, even if the caller introduces himself as a bank or technical support employee. Employees of organizations never ask for these codes. If you receive a message asking you to urgently follow a link and enter your card details, this is 99% likely a phishing attempt. Delete such a message and report it to your telecom operator.

Can I send an SMS if the phone does not have a SIM card?

No, to send classic SMS and MMS you must have an active SIM card with a tariff that supports these services. However, if you have set up call and SMS forwarding to another number or you use special operator services to send from a computer, technically the text will go away, but it will not be initiated from the device itself without a SIM.

Why do messages arrive with a delay?

The delay can be caused by overload of the operator's networks on holidays, the subscriber being in an area of poor reception or temporary technical work on the provider’s side. The delay may also be caused by the power saving mode, which limits the background operation of the messaging application.

How to send a message to an international number?

Enter the recipient's number, starting with the "+" sign and the country code (for example, +1 for the US, +44 for the UK), then the area code and the subscriber number. Make sure that the international SMS forwarding service is activated on your tariff, otherwise the message will not go through or an increased fee will be charged.

What are service messages and can they be disabled?

Service messages are mailings from a telecom operator with information about your balance, connected services and promotions. You cannot completely disable them, as they contain important technical information, but you can prohibit advertising mailings through the settings of the operator’s personal account or by sending a special USSD code.

How long are sent messages stored on the phone?

Messages are stored in the internal memory of the device for an unlimited time until you delete them yourself or until all available memory is full. Telecom operators also store metadata about messages (who, to whom, when) for as long as required by country law, but the text of messages is usually not stored on their servers after delivery.