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A solution to make a working baseband and bluetooth while using a TCL M2M lollipop ROM on a UMI eMax.
1. Get the modem_1_lwg_n.img file from the /system/etc/firmware directory of an eMAX KitKat ROM or download it from here.
2. Rename the file to modem_1_ltg_n.img (if not downloaded from here).
3. Install a TCL M2M ROM on your eMax, then replace the original modem_1_ltg_n.img file by the eMax KitKat one. - You can do that with TWRP's file manager, for example, just don't forget to mount the system partition. Again, replace the file in /system/etc/firmware.
4. Reboot or factory reset your phone. If you just rebooted, then you have to manually search for networks at the first time. It might need multiple attempts or reboots to be successful.
After you finished, all features of your phone will work except the camera.
Good luck!
Renamed KitKat modem file: modem_1_ltg_n.img
Windows Drivers: MT65x3_USB_VCOM_drivers.zip
lollipop ROM: emax_5.0_ALPS.L0.MP6.V3.20_JRDSH6752.LWT.L_beta.rar
lollipop TWRP for eMAX: UMI_eMAX_TWRP2.8.7.0_lollipop.img
SP FlashTool for flashing: SP_Flash_Tool_Win_v5.1548.rar
SuperSU installer (from TWRP) for rooting: SuperSU-v2.56-20151030013730.zip
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