Enable 4x DL NR-CA (TDD+TDD+FDD+FDD/TDD+FDD+FDD+FDD) on X70 modems with MPSS.DE.3.0 baseband firmware or newer:
This guide assumes you are already familiar with QPST and how to gain access to the diag port on your device. See this guide for enabling diag on various commercial UEs: Link
For an explanation on how hardware and software combinations are defined in Qualcomm firmware, see here.
Confirmed working with the following devices:
- Moto Edge+ (2023) (XT2301-1, Dish Wireless variant)
Devices with 4x DL NR-CA (TDD+TDD+FDD+FDD/TDD+FDD+FDD+FDD) enabled out of the box by the OEM:
- None reported so far
_Note: 4x DL NR-CA (TDD+TDD+FDD+FDD/TDD+FDD+FDD+FDD) is only available in NR-SA and 4x DL NR-CA may be limited to single SIM (ssim) operation depending on the UE.
How to enable 4x DL NR-CA (TDD+TDD+FDD+FDD/TDD+FDD+FDD+FDD) in NR-SA
Step 1: Launch EFS explorer
Launch QPST with your device in diag mode. Then, open the EFS explorer.
Step 2: Upload the NV item files for 4xNR-CA
Navigate to /nv/item_files/modem/nr5g/RRC/
Right click and “Copy item file from PC”, do not drag or drop.
List of NV item files:
cap_control_nrca_4x_f_plus_t_band_combos set to 00 01 01
For dual SIM devices, also copy over the files suffixed by _Subscription01
Download from here