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Shirasaki

macrumors P6
May 16, 2015
16,263
11,764
It's been that way since Beta 1.

When you update to 10.3, your filesystem is upgraded to Apple File System. Apple had to write code for that conversion to happen, but they didn't write code to convert your File System back to HFS+. (Why would they?) Since iOS 10.2.1 doesn't know how to use the APFS, downgrading results in an error.

You have to do a DFU (bare metal) restore to go back to 10.2.1.

That results in a "There's a problem with your iPhone.
So for the obvious reason , apple won't let you to restore back to iOS 10.2.1 even if it is still being signed??
Reasonable move.
 

larryak

macrumors member
Aug 4, 2016
39
19
SF Bay Area
Don't try and restore your phone back to 10.2.1... you get an error message at the end of a restore. Tried with multiple phones, cords, and computers.

I ran 10.3 beta 2 on my iPhone SE for one week, decided to revert to 10.2.1, had no problem doing so as DFU. Been successfully running 10.2.1 for a few days now.
 
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sbailey4

macrumors 601
Dec 5, 2011
4,571
3,253
USA
Delete your backup and do a clean one.
Yep had same problem with beta 2 and deleting the backup first solved it.

That's odd. Are you sure you're doing a DFU, not just recovery mode?

DFU is a bare metal restore, from the bootrom up. There should be no condition from which that's not possible.
I have seen others saying they were successful with DFU as well in the beta 1 and 2 threads.

[Edit] Restored iPad mini 4 to 10.2.1 via DFU and it worked fine. Of course the 10.3 backup would not restore and had to use a backup from 10.2.1 but the downgrade of iOS worked just fine.
 
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Tallfish0919

macrumors member
Mar 10, 2014
83
31
Yes I know how to properly DFU an iPhone........... I've tried with an iPhone 7 and iPhone 6s Plus
 

GrievingFob606

Suspended
Nov 15, 2016
229
74
NO WAY
Apple recently added the yearly subscription for $99. Insane as hell.
 

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ad931

macrumors regular
Sep 1, 2013
188
41
Athens, Greece
Anyone noticed that with APFS, available storage varies day to day? On initial install of 10.3, I had 3.3gb available storage. Couple of days later was down to 2.4gb, deleted RR3. (It's too boring now) which is 800mb, then cleaned the cache using the "iTunes trick", was back to 3.2gb, when theoretically I should have had 4gb

Installed beta 3 yesterday, went down to 2.3gb, did the iTunes trick , went back to 2.6, though "Phone Cleaner" (which was updated yesterday to support 10.3)' says I have 2.8gb available.

Can any of the developers here explain what's going on?

Thanks
 
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drgreenberg

macrumors member
Aug 6, 2010
48
26
In Calendar.app day view, swiping to move back or ahead a day produces an odd animation. The new day comes in from the wrong side (only with a fast swipe, not a slow and deliberate one). Anyone verify?
 
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Eduardo75890

macrumors 6502
Jun 13, 2016
251
124
San Francisco, CA
Have you tried unpairing and pairing? Have you update or installed as new?
I had a lot of stutter before 10.3b1 came out, and some of the problems came back when beta 2 arrived, I decided to go back to beta 1 for now and it seems things are even worse with beta 3.
I fixed it just had to unpaid and pair again.
 

gwhizkids

macrumors G5
Jun 21, 2013
13,306
21,484
Anyone noticed that with APFS, available storage varies day to day? On initial install of 10.3, I had 3.3gb available storage. Couple of days later was down to 2.4gb, deleted RR3. (It's too boring now) which is 800mb, then cleaned the cache using the "iTunes trick", was back to 3.2gb, when theoretically I should have had 4gb

Installed beta 3 yesterday, went down to 2.3gb, did the iTunes trick , went back to 2.6, though "Phone Cleaner" (which was updated yesterday to support 10.3)' says I have 2.8gb available.

Can any of the developers here explain what's going on?

Thanks

The betas, being betas, collect a lot of data (just as the rain in Spain falls mainly on the plain! ).

Over time, my storage, which always starts out great with each fresh install, gradually diminishes. I usually do a restore following public release to clear all those logs and whatnot and start fresh again.

Life on the beta trail...
 

mous94410

macrumors 6502a
Aug 12, 2015
630
472
I don't know what to say. I have an iPhone 6s Plus with an Apple Watch and AirPods connected
 

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