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Call forwarding "Failed to read data error"

AnonymousS10
Level 1: Joiner
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Hello,
I have a Samsung S10 (O2 pay monthly contract) and a Samsung software update automatically downloaded yesterday which has caused glitches I have never experienced before. My call forwarding is enabled and can no longer be disabled. The call forwarding to voicemail phone number that was set up has been removed and a "failed to read data" error message pops up whenever I tap anywhere in the call forwarding/barring sections.

If I try to enter a number in any of the call forward options eg 'Always forward' and click "enable" the number doesn't get saved and disappears. I can't disable the call forwarding meaning that I can't receive calls. I can make calls however.

I have spent hours with O2 and Samsung which was a massive waste of time as neither companies understands their own products.

I have done a network reset. Tried disabling call forwarding in safe mode - same error message. Did all the troubleshooting I could find. Tested my sim card on the Samsung app - works fine, I can make calls and access all my contacts. Tried the ##002# to cancel all diverts but it didn't work and got an MMI error code 801. I don't want to turn off my voicemail so didn't try 1760.

Another issue I have is the voicemail number I was given by O2 to forward calls to (not 901 but a 11-digit long number) in the "always forward" setting was removed after the latest update and I didn't make a note of it. When I asked O2 they had no idea what I was referring to. Does anyone know the number? It's not 901 but a +44... number for the voicemail.

Any help would be much appreciated. Thank you!

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MI5
Level 94: Supreme
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@AnonymousS10 

Have you tried a factory reset?

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
Message 2 of 4
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AnonymousS10
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I don't want to start having to do a factory reset every time there's a software update. My phone was working absolutely fine up to that point. It's a huge amount of time trying to restore some of the apps data.

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MI5
Level 94: Supreme
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Your choice of course but it's not working perfectly no so I don't see much choice.......

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
Message 4 of 4
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