How do I change from E to 3G on Lumia 535?

Go to settings > Cellular + Sim > Sim Settings > Highest connection speed > Select 3g.
It will only work if u got 3g activated Sim and proper 3g coverage though.
 
I made that but still showing E
I was having nokia xl and I make to wcdma only (3g only) by dialing *#*#4636#*#* and the net was very good
 
Oh, may be try restarting the phone.
If still no then probably the 535 has a weaker reception than XL.
 
Are u sure ur network settings are rightly setup?
If yes then it might be a faulty antenna or that the Lumia 535 has generally weak signal reception.
Try and see if by going to another area u get 3g signal and if u can also try the Sim on any other WP 8 Lumias.
 
are you sure your phone has the bands necessary to communicate with your service providers 3G bands?
 

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