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Capacitors are in output matching network of RF power amplifier, matching and LPF.
Yes , I plan replace it with ceramics NPO, but in original is not ceramic because ceramics capacitor have yellow color.
may be silver mica but this is to the greend clolor in SMD.
From capacitors I have seen, they may be PEN or PPS (doubt the latter but who knows) or polyester - polyester/metal film are usually large like 1210, all mine are "silver". I would browse an online store or manufacturer and look at examples of lesser used SMD caps. Possibly PPS with that colour but not sure at all. If not pale pink but silver, could be PEN. If white/white-ish, I have some low pF NPO that are more white than silver or pink and definitely not yellow (they were a bright pink in the catalogue/stock photo but that might be meaningless). I assosciate yellow/marzipan with X7R types.
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