Turn off predictive text

It sounds like you have followed the correct procedure, but make sure it is 'auto-correct'.

https://www.google.com/search?q=Doro+5680+turn+off+predictive+text

..

To turn OFF predictive text mode, press and hold the # key.

To turn ON predictive text mode, press and hold the # key. The icon at top-left (next to abc, Abc, or ABC) moves right.

Alternatively
Enable or disable predictive text
From the home screen press the Menu button. Move the cursor to Message and press the OK button.

turn off predictive text

How to turn off predictive text in iOS 8

To turn off predictive text, go to Settings - Language and Keyboard - Touch Input - Text Input - Prediction.

Then select On or Off - See more at: http://www.phonetipsandtricks.com/tips/samsung-galaxy-note/turn-off-predictive-text-38/#sthash.MPTR2fvE.dpuf

Yeah, drives me crazy too
Try:
menu > language and keyboard> touch input> text input> untick prediction

Hello.
Welcome To Fixya Community.
I am glad To help You Sir.

"To activate/deactivate predictive text input, press # twice quickly.
This activates predictive text input for all editors in the
device."*

*Source:
Nokia E51 User Guide.

Thank You For Using Fixya.
Please Give a good Feedback^^

Predictive text (or T9) is usually turned off by holding * or # for few seconds, or you may need to go to message settings and turn it off there. What kind of phone are you using?