[Galaxy S 5 General] chirantha7777:
I note the following issues in the Marshmallow update SM-G900FD

1. Call recording - Android API access is completely broken normall it would record in mode 2 but it doesn't work anymore. The following Call Recorders did work they are (Total Recall, Boldbeast Call Recorder) as they use a different approach. I payed for both. But actually both are having hit and miss issues. Sometimes the call recordings are perfect, sometimes they are missing the first 3-7 seconds. Sometimes call recording fail and it doesn't fix itself for a duration of time. Boldbeast contacted me and informed me that the reason behind it is that there is an issue in the ROM that causes the call recording to fail randomly.

2. System Restarts - I'm in a call for a long duration and after the call the Android OS is asking me for my backup password saying that the System just restarted while I was on the call. WTD!

3. System Lockup during Redials - I can confirm that it has nothing to do with call recording but it seems the UI becomes unresponsive sometimes when the phone is starting a call. This is a horrible when the phone is redialing a busy number. For example, my friend was in a class and he was busying my call and I just kept ringing him back. At my end. the UI was frozen and I couldn't stop the phone from redialing. :-

4. No access to band selection (Service mode) - I live in Sri Lanka, so even in populated cities the coverage is low, I used to put the phone on 3G/4G only mode through the hidden menu via *#0011# because sometimes the stupid thing reverts to 2G. Now its no longer possible.

5. Low Battery life and No Doze - I have only noticed a decrease in battery life. Doze doesn't seem to be kicking in.

6. Slow charging - In Marshmallow power saving mode gets disabled when the phone is charging causing slow charging because in Lollipop the Power saving mode existed even while charging contributing to a faster charge.

7. Smart Pause icon - It remains half enabled even when Smart Pause is completely off.

8. Ugly app drawer - Doesn't look classy or professional. It looks like more Cartoon like. Lollipop was perfect.

9. Issues moving apps to SD Card - Many of the Apps that were in the SD before the upgrade was reported to be in internal storage (In reality it wasn't). When I told to move it to SD the whole phone crashed and restarted and the App was found corrupted. Had a tough time trying to uninstall it afterwards.

10. File type association, no way to reset - I opened a file in the File Manager through the video player which was not able to play it. Now I it opens it by default through video player and this selection is not even listed in the default applications area. I find no way to undo or ask another app such as VLC to open it.

Considering these issues, I decided to the downgrade to Lollipop today, from the 17th of May I tried to LIVE with Marshmallow but its a horrible update for the S5 which I think Samsung intends to make users buy the S7 making them fed up with the S5. The only issue Lollipop had was the System Sound volume issue (high from time to time) and Calls not ending even when told (the phone doesn't stop calls on redial and sometimes the phone continues the call without your knowledge).

Message received from Boldbeast

How to downgrade 900F variant to Lollipop from Marshmallow

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