How can the Huawei G520-5000 Mobile Customized Edition use China Unicom's 3G network?
It is said online that this can be done as follows: 1. Turn on the phone and go to the dial interface, enter *#1111# to enter test mode; 2. Press the menu key and select back; 3. Press the menu key again and select select, enter 0 in the pop-up input box, and click OK; 4. Then choose umts-debug screen-phone control-network control-band selection in sequence, which will enter the network mode selection. Choose wcdma band preference to make the phone only use the WCDMA network; 5. After that, some I9508 may pop up with band selection, I directly selected the WCDMA ALL option, which includes all WCDMA bands. For the China Mobile version of the HTC One, enabling China Unicom 3G network is a bit more troublesome and requires flashing the ROM. The ROM can be downloaded here, and it is said that this bug was discovered unintentionally by the ROM author. The specific method of realization is to open Settings-Mobile Data-SIM Slot One Network-GSM/UMTS option-Network Mode-Select WCDMA Only after flashing the ROM. At this point, the phone will have no signal. Then go back to the GSM/UMTS option-Open Network Operators-Select Automatic Network, and the network will display. In addition, some people have released ROMs supporting China Telecom CDMA network for the China Mobile version of HTC One, but some users reported that they did not detect the CDMA network after inserting the China Telecom card, indicating that the ROM still has issues with China Mobile. This situation is not very strange. The 'culprit' is actually Qualcomm. Currently, Qualcomm's new processors are mostly paired with the fifth-generation Gobi 4G LTE modem chip, which supports networks such as LTE Rel9, HSPA+ Rel8, 1x/DO, TD-SCDMA, and GSM/EDGE, thus enabling support for the 3G networks of China's three major carriers. Currently, most Snapdragon 600 flagship models are paired with the MDM9215 baseband chip, which theoretically all have the possibility of being modified to support all three networks.
