I log into Slack from my mobile phone web browser (Chrome 48 on Android 5.1), and I see:
Hey there !
Account settings
Notification settings
Team directory
Customize settings
Statistics
The only way I can see channels is by clicking the menu button at the top, which brings this menu:
signed in as
Home
Account & Profile
Configure Apps
Message Archives
Files
Team Directory
Statistics
Customize
Team Settings
And then clicking "Message Archives", which lets me see others' messages but still doesn't have a way to post messages.
Is there another way to do this?
Best Answer
From what I can see, you cannot post messages on Slack from the mobile web site. Even if you request the desktop version of the site there does not appear a way to post messages.
You'll need to install the Slack app.