iPhone · Research guidance. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Read the feature distinction
Apple’s predictive-text guide says correction suggestions can still appear after Predictive Text is turned off. Its keyboard documentation also lists Auto-Correction separately. If an app changes a word after you disabled predictions, first identify the mechanism rather than assuming the setting failed or the player rewrote your account information.
Consider a support-code example
Imagine entering an unfamiliar model name into a support message. Removing the row of suggested next words does not by itself establish that spelling correction or a custom replacement has stopped. Compare the exact text before and after the triggering space or punctuation, using a harmless invented example instead of a private account identifier.
Inspect the relevant option
Use the actual keyboard settings for the installed version and inspect Auto-Correction, Predictive Text and Text Replacement separately. Apple documents ways to revert a visibly corrected word. Preserve any assistance the viewer needs for ordinary writing; a targeted comparison is more useful than resetting the whole keyboard merely to stop one unwanted substitution.
Review what will be sent
Read the final message and exact product names before submission. An understandable sentence can still contain an inaccurate identifier. If a website reports an account error, keep that provider response distinct from the text-entry comparison; an altered draft is not evidence that the service changed the underlying account record.
Questions, answered
Does Predictive Text off guarantee no correction suggestions?
No. Apple explicitly distinguishes the behaviours.
Should exact identifiers be checked before sending?
Yes. Review the final entered characters.