RAM+ROM ----- BISON GT2 5G: 8GB+128GB / BISON GT2 PRO 5G: 8GB+256GB. Color ----------- BISON GT2 5G: Storm Gray/ BISON GT2 PRO 5G: Hack Black. UMIDIGI BISON GT2 | GT2 PRO 5G. BISON GT2 5G is8GB +128GB ,BISON GT2 PRO 5G is8GB+256GB.
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