Firmware G991BXXU4BULF

Device Galaxy S21 5G

Model SM-G991B

Region IUS

Country Mexico

OS Android 12

Release Date 12/23/2021

Upload Date 2/7/2022

PDA G991BXXU4BULF

CSC G991BOWO4BULG

Changelist 23365054

Size 6912254939 bytes (approx. 6.4 GB)

IUS CSC Breakdown

Network ID

NW00614

Network Name

Iusacell

Network Country

Mexico

Network Bands

UMTS 850 / UMTS 1900 / UMTS 1700 / LTE 850 / LTE 1700 / LTE 2600 / TD-LTE 2600 / 5G 2600 / 5G 3500

Network ID

NW00855

Network Name

Nextel

Network Country

Mexico

Network Bands

UMTS 1700 / LTE 850 / LTE 1700

Network ID

NW02039

Network Name

ATT IOT

Network Country

Mexico

Network Bands

Unknown