Both phones are already on pre-order in China. The latest vivo X-series flagships are now official and they bring refinements across the board compared to
vivo X90 and X90 Pro announced with Dimensity 9200 and 120W charging - news
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vivo X90s with 6.78″ 1.5K 120Hz OLED display, Dimensity 9200+, up to 12GB RAM announced
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Vivo X90 Series to Feature Dimensity 9200 and Sony IMX758 50MP Sensor - GeekBund
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Vivo X90 official announcement Live Blog - PhoneArena
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Vivo's X90 Pro and its massive 1-inch camera sensor get an international launch - The Verge