It's the light-blue app with a white paper airplane in the middle, usually located on your home screen. Log in with your phone number if you aren't logged in automatically.  Search results will filter as you type. If you typed the search term correctly, it will be the only result at the top. It's the channel with the username "@tchannelsbot" under the title. It's at the bottom of the screen. If you don't see this option, you can type /start into the message bar at the bottom, then press the blue "send" arrow above the keyboard. You can tap any of the buttons that appear, such as:   Top Chart: displays the most popular channels.  Recent: displays a list of recently created channels.  By Category: displays all the channel categories.  Search: lets you search for channels. Find a channel you want to join, then tap the link listed for the channel. It's at the bottom of the channel. You are now a member of the channel.

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Write a summary of the previous text in Indonesian:
Buka Telegram. Sentuh bilah pencarian di bagian atas jendela. Tikkan tchannelsbot pada bilah. Sentuh opsi "Telegram Channels Bot". Sentuh Start. Sentuh opsi. Buka kanal. Sentuh ＋ Join.