Phone not recognizing Sim Card after update.

[CosmicWarrior]

I have an Asus Zenfone Max Plus. I bought it unlocked, back in September 2018 and had a Public Mobile sim card in it since. It's a two sim card slot smartphone, but my sim card has been working perfectly fine until now.

On December 1, 2018, I updated my phone's software (it runs on Android) but for some reason, my phone cannot recognize the sim card at all. Every time I tried inserting it in, it keeps reading unavailable, both on slot 1 and 2. I bought a new PM sim card, but it's the same story -- read unavailable.

However, things get weirder. It doesn't read Public Mobile sim cards, but it reads other sim cards from different companies like Koodo, Telus, Freedom, Rogers, etc. It's not a hardware issue, it's something else; Public Mobile related.

Can you help me solve this issue? Please and thank you.

[rkcb]

---

@CosmicWarrior wrote:

I have an Asus Zenfone Max Plus. I bought it unlocked, back in September 2018 and had a Public Mobile sim card in it since. It's a two sim card slot smartphone, but my sim card has been working perfectly fine until now.

On December 1, 2018, I updated my phone's software (it runs on Android) but for some reason, my phone cannot recognize the sim card at all. Every time I tried inserting it in, it keeps reading unavailable, both on slot 1 and 2. I bought a new PM sim card, but it's the same story -- read unavailable.

However, things get weirder. It doesn't read Public Mobile sim cards, but it reads other sim cards from different companies like Koodo, Telus, Freedom, Rogers, etc. It's not a hardware issue, it's something else; Public Mobile related.

Can you help me solve this issue? Please and thank you.

---

Has there been any progress in resolving this issue?

[Anonymous]

---

@popping wrote:

---

@popping wrote:

Access Safe Mode by long pressing power key > tapping and holding Power Off > tapping OK. If your phone works well in Safe Mode, there may be some 3rd apps that cause malfunction.
Please reboot your phone and check again if it works well

---

Safe Mode does not start any installed apps.  To find the problem app, start your installed app one at a time.  

Disclaimer:  I have not done anything with Safe Mode.  Do it on your own risk.

---

Nice find though popping. Seems to be a similar idea to Windows.

Edit: We need a brave soul to try it out and go Eureka! It's this app!

[popping]

---

@popping wrote:

Access Safe Mode by long pressing power key > tapping and holding Power Off > tapping OK. If your phone works well in Safe Mode, there may be some 3rd apps that cause malfunction.
Please reboot your phone and check again if it works well

---

Safe Mode does not start any installed apps.  To find the problem app, start your installed apps one at a time.  Uninstall the problem app and restart your phone normally.

Disclaimer:  I have not done anything with Safe Mode.  Do it on your own risk.

[popping]

Access Safe Mode by long pressing power key > tapping and holding Power Off > tapping OK. If your phone works well in Safe Mode, there may be some 3rd apps that cause malfunction.
Please reboot your phone and check again if it works well

[CosmicWarrior]

I EVEN factory reset my phone too. The problem was not solved.

[MoreYummy]

Only resort is to reset the phone to factory status.  

Since the sim works on other phone, it is the software update messaed it up.   

[CosmicWarrior]

I already did insert my sim card into another's phone. It was working just fine.

[popping]

Read the follwoing thread on Asus Zenfone Max Plus to android 8.1

https://productioncommunity.publicmobile.ca/t5/Phones-Hardware/Connectivity-issues-after-upgrade-to-...

Try your SIM card on your friends phone to determine your PM SIM is still working.  Then, concentrate your effort to find a solution to the hardware/firmware problem.

[Anonymous]

 @CosmicWarrior

Android 8.1 strikes again. Dang.

[CosmicWarrior]

I already did a network reset and restarted my phone. Still nothing.

[popping]

---

@CosmicWarrior wrote:

I have an Asus Zenfone Max Plus. I bought it unlocked, back in September 2018 and had a Public Mobile sim card in it since. It's a two sim card slot smartphone, but my sim card has been working perfectly fine until now.

On December 1, 2018, I updated my phone's software (it runs on Android) but for some reason, my phone cannot recognize the sim card at all. Every time I tried inserting it in, it keeps reading unavailable, both on slot 1 and 2. I bought a new PM sim card, but it's the same story -- read unavailable.

However, things get weirder. It doesn't read Public Mobile sim cards, but it reads other sim cards from different companies like Koodo, Telus, Freedom, Rogers, etc. It's not a hardware issue, it's something else; Public Mobile related.

Can you help me solve this issue? Please and thank you.

---

Someone reported similar problem recently on Zenfone update to Oreo.  I will serach and update this thread.

For the time being, network reset your phone and restart your phone.