S9+ recent update disaster how can I get previous update reinstalled? - Samsung Galaxy S9+ Questions & Answers

Yesterday I recieved an update on my s9+ (SM-G965U1) and it has become unusable. The phone was purchased overseas and has been working fine in Australia for the last year.
I keep getting a notification that IMS has stopped working, the touch screen is lagging badly and it is churning thru the battery. It is now also dropping out during calls and my messaging app wont open.
Can I reinstall the previous version? If so, how?
I am not hugely tech savvy but desperate for any help as phone is nearly unusable!

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[Q] Missing Calls/Texts with custom ROM

I recently flashed to FroydVillain 1.5.0 and the ROM_Radio_G3_Radio_HERO_63.18.55.06S_6.35.17.03 radio and I've been experiencing some strange things.
During a call (an important one so Murphy and his law were surely not going to leave well enough alone), the phone not only DROPPED the call, the phone actually rebooted.
I find that my phone will miss/not receive the signal from my carrier and I'll miss both calls and texts.
UPDATE: I just want to clarify on the missed calls. They will go straight to voicemail and then between 2 and 24 hours later I'll get a text saying I have "9 New Voicemail". This, as you can imagine, is problematic at best.
Is this a ROM Problem? (Okay the phone rebooting likely is. But the calls and Texts?) Is this a carrier thing?
Also, as an aside since I'm planning ahead: For those who have done this before, how do you go about getting rid of still functioning smartphones to upgrade to the latest and greatest? I kinda want to move on to an HTC Desire Z with Bell but I don't want to just pitch my Hero either.

Reverting back to stock on Rogers

Hey guys.
I have a Rogers X10(Canada) and I'm trying to go back to the latest stock firmware from Sony/Rogers because Cyanmogen has rendered my phone kaput with dropped calls, weird noises and a close friend of mine can't even call me anymore. Sometimes the calls will get through but then it's just this weird static and we can't hear each-other, other times it just says "Try again later. call cannot be completed". I considered it as maybe a SIM issue but even after purchasing a new one yesterday, still no dice. Along with horrible 3G and so forth.
So I did some research and tried to get it done, but SEUS keeps telling me that I have the latest version of the software and cannot repair/reinstall Sony's firmware. This is the only phone I have and I would very much appreciate some help in getting it back to stock in an hour and a half before I need to go to work :S It's Friday after all and I would like a phone tonight!
\
Thanks
Nevermind! I got it!

Calling Plus issue on latest update for Sprint S9+

Within the last week, I downloaded and installed the latest update for the Sprint S9+ (ARG7). Before getting the update, Calling Plus was working fine. The transition from wifi to data during a call worked great. After taking the update, CP is hit and miss. Sometimes it's enabled, sometimes it isn't. It usually only enables itself while on wifi. When on a call and leaving wifi, CP completely drops and the call drops. Is anyone else having this issue? If so, how did you fix it? I'm really hoping I won't have to reset my phone.
It all makes sense now.... I've been on the phone with Sprint and Samsung the least few days and nobody can figure out why. They wiped and reinstalled everything... Still nothing... Went today to Sprint and they gave me another sim card.... Still don't work.... So I just looked up online and see that Sprint is doing away with calling plus and finally getting voilp..... And the technician said that Sprint was discontinuing calling plus
bone6606 said:
It all makes sense now.... I've been on the phone with Sprint and Samsung the least few days and nobody can figure out why. They wiped and reinstalled everything... Still nothing... Went today to Sprint and they gave me another sim card.... Still don't work.... So I just looked up online and see that Sprint is doing away with calling plus and finally getting voilp..... And the technician said that Sprint was discontinuing calling plus
Click to expand...
Click to collapse
I ended up resetting my phone and it fixed it at that time. I still randomly have Calling Plus crap out. No idea why it's happening still. Sprint is indeed doing away with Calling Plus in favor of VoLTE. People have been saying don't take the update for your phone for VoLTE of you're not in a soft launch market.

P20 Lite Losing Sim Card (Service) after last update ANE-LX1 8.0.0.147(C782)

Hello XDA Community,
Last Saturday my P20 Lite updated overnight. Sunday morning, when I checked the phone, the sim card picture with the (!) inside was on the top of the screen along with the message "No Service".
It had to be something related with the update (I guessed). Restarted the phone and all good. But only for a while. 30 minutes later the issue came back again. And then again, and then again. The phone works fine for a few minutes (good signal, 4G comms perfect, calling and texting too) and then it's just like someone has removed the sim card. If I'm connected to Wi-Fi, everything works except for the calling/texting.
Cleaned the slot, cleaned the sim card, network settings restored and still the same.
The solution to have network again is to turn the flight mode on and off all the time.
It seems to me that this is a software glitch rather than hardware.
Anyone having the same problem?
Thank you guys.
Same issue
Hi,
I've got the same issue here. Update just before I went on holiday and now I get a signal for a little while then it goes to no service. When it's ok you can check signal quality no problems. Once it stops it just keeps going back to main options screen, looks like a software bug to me.
Any one have any suggestions?
Update
Hi,
I've been in touch with my provider and they gave advised the usual:
Check coverage is ok - yes
Check some works in another phone - yes
Factory reset - not tried yet.
Anyone else have the same issue or an idea?
Exactly the same issue with mine since the update. Are Huawei actually going to fix this or are they just staying quiet?
What a piece of ****. After 3 days trying everything and resetting to factory still the same. No patch available. Terrible Huawei service say they're working on it.
I just went out and bought another phone. Mine is just 3 months old. Any ideas? Or is it scrap?
Support
I messaged Huawei in Twitter and they asked me to DM them but I can't for some reason. They wanted IMEI number so I'm no further on.
I have found that if you put the phone in aeroplane mode and then re-enable WiFi it is usable (except for calls).
Can anyone else message Huawei in Twitter to see what response they come back with.
Having the same problem here. Emailed and tweeted Huawei but no reply. Also experiencing slow charging, fast battery run-down, and general performance issues since the update. Phone is just 3 weeks old, bought in GB but now being used in Australia. SIM worked fine in my old British bought phone. Can't afford a new phone has anyone heard anything? ​
Location services
Hi,
I found that I was able to use all services if I disabled location services.
Got a popup about network time but the phone is at least usable - as a phone too!
I'm on holiday at the moment so will chase up Huawei when I get back and let you all know how I get on.
Did anyone ever get a solution to this having the same problem abroad currently
Mine resolved itself, but then come the NEXT update exactly the same thing has happened. It's been about 2 weeks now and the phone is practically unusable with fast battery run-down and slow charging too. Huawei customer service is terrible and don't give me any solution beyond a factory reset which I've tried to no avail. I'm also overseas too having purchased the phone in the UK and am now using it in Australia.
Did you guys get the phones working again?

Question 5G/4G network issue - Find N2

Hello guys,
does anyone is experiencing issues with oppo find n2 with 4G/5G network ?
Actually, I got the phone and all was working fine but since a while the phone doesn't seem to have any coverage ...
I checked my sim card on another phone and its working pretty fine ...
any clues ? or hint to reset or choose a specific band ?
thanks !
Oppo find n2 working fine with 4g 5g on TMobile North East USA. Wonder if removing stock apps messed with something. Have you tried resetting to factory and testing again.
I am here in Toronto, Canada and using Telus(business) and Koodo(personal) For some reason, I get dual 5G standby even with Koodo. No issues at all.
I've got the Find N2 Flip, in the UK so not sure how relevant this is..... I'm having major issues with receiving SMS though, one minute it works, the next it doesn't for whole days. Or I'll have somebody send me a text, won't receive it, then starting from several hours later I'll receive that one text dozens of times over the course of the day and still keep getting it the next day. Seen a few Reddit posts about SMS issues. It's just a vague assumption but I feel like some of these Oppo phones just don't like the UK networks. The flip only went on sale here this month, so I'm hoping it gets fixed soon. It's an amazing phone, I wouldn't get rid of it even with this problem, but it is a major inconvenience when almost every single account I have everywhere has 2FA set up lol.

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