I'm facing a serious issue on my samasung galaxy a7 2018. When I turn on data it shows E/2G

I'm facing a serious issue on my samasung galaxy a7 2018. When I turn on data it shows E/2G on top. Every time I have to restart device to use my 3G/4G data

Can you try a different SIM in it, or your SIM in another phone?

Welcome to Android Central! What's the exact model number of the phone, and which carrier are you on?

Yes I have tried all network sims. But to no avail. In other phones network 3g 4g works fine

Samsung Galaxy A7. My carrier is zong.

What's the exact model number of the phone? Go to Settings>About Phone to find out. You need to check the specs of that model and make sure it supports Zong's 3G and 4G bands: https://www.frequencycheck.com/carriers/zong-pakistan

Samsung SM-A750F/DS
Galaxy A7 2018
This is model.. it supports 3g. 4g.
4g works fine when I restart phone till a day. Then it changes to 2g

Look for an option called Preferred Network Type, probably in the Settings>Mobile Networks menu. What's it set to?

Also, check your APN settings to make sure they're correct for Zong:

https://www.androidcentral.com/what-...do-i-change-it
https://www.zong.com.pk/internet/int...settings_guide

I've tried all tricks.. I've done hard reset phone to factory default too. Problem isn't with the network. I've tried different operator Sims. My friend is having the same issue with this model phone. I think its a hardware issue

After hard reset, 4g worked fine for one week. But again same issue. Now I've to resart my phone twice or thrice a day to use 4g.