Sim card slot 1 no longer working

[Android Central Question]

I have a Huawei P20 Pro (dual sim). Last month I visited Vietnam and bought a Vietnamese sim card (on Mobifone network). The staff put the sim in for me, in slot 1, and changed some settings to make it function (didn't see exactly what they did), leaving my UK EE sim in slot 2. Both sims worked absolutely fine.

Since returning home, I have tried to use my dual sim with two UK sim cards (original EE, still in slot 2, and a Virgin Mobile sim in slot 1). The sim in slot 1 shows emergency calls only.

The Virgin mobile sim works perfectly in slot 2, and the EE sim also does not work in slot 1, so the problem is nothing to do with the sim cards. I have tried resetting network settings, HiCare diagnostics on the phone with Huawei customer support to no avail. Have also tried manual APN settings for the Virgin Mobile sim in slot 1, yet nothing will make it budge from 'Emergency calls only'.

Is it possible the staff in Vietnam changed something that means slot 1 is no longer working with a UK sim? Or is it a hardware issue?

 

[mustang7757]

Hi, welcome to Android Forums

I'd like to recommend creating a account so me or other members can assist you, as guest have limitations in replying here and if we need further Information to communicate with you.

I'll provide a link to register, please come back to your post so we can further assist you . Thank you

https://forums.androidcentral.com/showthread.php?t=409154

 

[mustang7757]

Sounds like you'll need the correct APN for sim 1 sim card

 

[anon(10614692)]

This is off CPW website
Android APN settings for Virgin mobile

Here's how to manually add the Virgin mobile internet settings on an Android phone.
1.Open Settings from the Home screen.
2.Tap Wireless and networks or More (this depends on your Android version).
3.Tap Mobile networks > Access point names.
4.Tap the Menu button (this could be the lower-left soft key, 3 dots in the top right corner, or the word 'more').
5.Tap New APN.
6.Type the following: a.Name: Virgin Internet
b.APN: goto.virginmobile.uk
c.Username: user
d.MMSC: http://mms.virginmobile.co.uk:8002
e.MMS Proxy: 193.30.166.2
f.MMS Port: 8080
g.Authentication Type: PAP. If you're given a choice of APN types, select internet+mms, or if the keyboard appears, the * symbol.

7.Tap Menu > Save.
8.Pick the name we've just created

I realise you have done this but the settings can change and these are the latest. If all else fails, back up, reset and restore your phone. I have a feeling it's a settings issue.