how to fix moto e and moto g2 3g/hspda only mode

Due to week signals in certain area this happens and the main question is that :how to fix 3g network in moto phone or how to force motorla phone to get 3g/HSPDA/UMTS network only. so on the demand i am here with the solutin of forcing 3g network in any motorola phone including moto E, moto G or G2,and also it works on moto X. So follow the below instruction to fix 3g network.
 
How get 3g network only in moto phone:

• First we need to define in which SIM we want to enable 3G. For this go to-
• Settings > Dual SIM settings > Mobile Data > choose the desired SIM.
• skip step first if only one sim is in use.
• Open your Phone (Dialler) app{the one which you open while dialling a number}.
• Enter this code: *#*#4636#*#*
• An app known as "Testing" will be launched.
• Touch the first option "Phone information".Don't touch other options.
• You will notice a drop-down option above "turn off Radio" button. Tap on it.
• Select the third option "WCDMA Only". Wait for a while...
• You will see that network has changed to 3G mode in the notification bar. If network doesn't change, touch the "turn off Radio" button. you will see your phone's signal are lost. Now again turn it on by tapping on the same button.
• Your 3G/HSPA/UMTS must have been enabled now.

NOTE: Inside the 'Testing' app, don't touch the other settings unless you are sure about them or you will land up in trouble.

 

For beginner: If you think remembering or dialling the code is difficult, then you can download the "Phone Testing" app from Play Store. It directly opens the "testing" options in 1 tap.