I would say:
4. At least he knew you have a phone.
Possible context: as comment or reply after "He said he should
have called me instead of waiting until he saw me, but . . . "
8. 'thick' is pronounced like 'sick'
That is, if by "like" you mean "rhymes with, but has a different
initial consonant". If you mean EXACTLY like, I would call this
a plausible utterance. I have heard similar things in foreign-
accented speech from those whose first language doesn't
use initial unvoiced "th". (Where is IPA when I need it?)
Native speakers of German and related languages come to mind.
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