How to force the mobile phone network mode to 2G 3G 4G/LTE on Android

How to force the mobile phone networks to 2G 3G 4G/LTE on Android
- input the USSD code *#*#4636#*#*
- the window will popup,
- select the option titled Phone Information
- Set Preferred Network Type
- WCDMA preferred will use both 2g and 3g whichever has the better reception
- For 4G/LTE select LTE only.
- For 3G select WCDMA only.
- For 2G select GSM only.
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Видео How to force the mobile phone network mode to 2G 3G 4G/LTE on Android канала Prateep Gedupudi