[Nokia Lumia 920] karlmueller:
Since I read that a lot of you guys have or had major stability and battery usage issues after flashing your international version (RM-821) Lumia 920 to one of the Portico ROMs I was wondering what might be causing those issues.

First I thought this might just be a few ppl with "bad luck" who had those Portico problems but then when I read more and more ppl posting about it and some even saying that they had so much issues with Portico that they flashed their phones back to a non-Portico ROM that made me really curious.

I was probably one of the first who flashed a Portico ROM to my RM-821 a few weeks ago. The reason I did it was because with the old ROM I had the issue that I couldn't access any files on my phone from my computer when it was connected via USB plus I read that Portico significantly improves the camera and I was about to spend a few days in London where I was planning to take lots of pics that was a reason too.

Since when I flashed my phone on December 21th there were not many different Portico ROM around to choose from and since I didn't want an EU one because of the volume capping I picked the one for Entel Chile:

White Entel PCS (059R6J2) 1232.5951.1249.1001

I'm using my Lumia with that ROM since then and I'm pretty happy with it so far.

I had not a single reboot/crash/hang, I took tons of pretty good pictures in London, 3G & HSDPA data is working perfectly on Vodafone Germany as well as on Vodafone UK (using a local PayG SIM card) and pretty much everything else is working fine too.

The only issue I have is that sometimes Nokia Drive and Nokia Maps seem to be unable to acquire a GPS signal but so far shutting down the phone and switching it on again always did the trick. I never had this issue with the non-Portico ROM but as I said other than that Portico is working perfectly for me and I take that tiny GPS problem over that super annoying unable to access any files via USB problem I had with the old ROM anytime.

So I was wondering what might be the reason that my phone is working so good with Portico while so many of you guys have so many issues with it. And so I came up with the following:

After flashing my Lumia with the Portico ROM I was originally planning to restore the "app list + setting" from the cloud but I didn't sign in to my Microsoft account during that "Welcome To Windows Phone Wizard" that comes up right when the phone starts for the first time after flashing it to a new ROM and when I tried to restore those setting using the "back, app list + settings" from the settings menu later it didn't show any backup that could be restored.

So I had to set up all my apps and setting manually again - I was quite unhappy about this back then because it took me almost two days to get everything back to how it was before flashing to Portico but now I think that this might actually be what saved me from all the issues so many of you guys have with Portico.

I think that when a phone is updated to Portico using OTA like it's supposed to be done this might also includes migrating any settings backed up on the cloud to Portico before then importing those migrated settings.

However when we flash a phone to a Portico ROM manually the step of migrating settings backups on the cloud to Portico is probably skipped.

And I assume that importing those unmigrated pre-Portico settings to a Portico ROM might cause lots of the issues that many of you guys experience.

So I'm wondering has anybody else flashed their RM-821 to Portico without restoring any setting backups from the cloud and if so do you have any issues with Portico so far?

p.s. please note that this theory is just something I came up with while wondering what might be the difference between my phone and the ones of all of you guys who reported all those issues - I have NO proof, facts or anything like that to back up this theory so please don't rip me into peaces if this turns out to be total BS