I got this phone earlier today and had the same question. Hoping you've figured it out - as this was the first google result I thought I'd make a reply with what I've found out. To cycle through, just tap the word you've typed. It should still be in a grey box. If you're accurate, it opens a list of words that the computer didn't use. So if you're trying to type 'me' and it shows up 'of', then tap 'of' in the box and choose your word!
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