Redmi 2 is available in 3 different "Device ID". Which are given below :
HM2014811 Is "China Unicom 4G Dual-Sim Version". It Supports These Network Bands/Frequencies:
4G Network : FDD-LTE (B1 / B3); TDD-LTE (B41: 2555-2575 MHz)
3G Network : WCDMA (900 / 1900 / 2100 MHz)
2G network : GSM (900 / 1800 MHz)
HM2014812 Is "China Telecom 4G Dual-Sim Version". It Supports These Network Bands/Frequencies:
4G Network : FDD-LTE (B1 / B3); TDD-LTE (B41: 2635-2655MHz / 2555-2575 MHz)
3G Network : CDMA (2000 / EVDO Rev.A 3G); WCDMA (850 / 1900 / 2100 MHz)
2G network : GSM (900 /1800 / 1900MHz); CDMA1x
HM2014813 Is "China Mobile 4G Dual-Sim Version". It Supports These Network Bands/Frequencies:
4G Network : TDD-LTE (B38 / B39 / B40 / B41: 2555-2655 MHz); FDD-LTE (B3 / B7)
3G Network : TD-SCDMA (1900 / 2100 MHz); WCDMA (850 /1900 / 2100 MHz)
2G network : GSM (900 / 1800 / 1900 MHz)
(MIUI FAQ)
Mine's HM2014813.
A lot of people experiencing problems when flashing MIUI 8 ROM to this phone.
When u flash a global ROM into Redmi 2 Prime usually you'll notice that the signal bar shown nothing. You can't make a call, sms, etc. This is actually pretty easy to fix, you just have to flash a modem file from redmi 2 ROM chinese developer with the same MIUI version. Remember, same version. Lots of people flashing a modem file from redmi 2 rom with the different version, it's not going to fix the problem but you'll get another problem. You can't open your settings and you won't be able to uninstall an App.
If you guys looking for the modem file you can download it here : NON-HLOS.bin
Flash it through MiFlash and your phone should fix from any bugs/problems.