Thank you very much, Shades, for your answer.

To recapitulate: If I preformat the SSD as MBR, then Win10 will make an MBR installation. So I can format the SSD as one big partition, correct?

What about the UEFI BIOS - do I need to change anything there.

I tried to connect to the forum via tapatalk today, and when I searched in tapatalk for the forun, I found a working entry saying "Live information from the Donationcoder.com forum"  but I was not able to connect through tapatalk to the forum itself.

Will you still make tapatalk available to read the forum?

It would be great.

Excellent and well priced 3GB phone with Dual-SIM Dual-standby:

http://www.kimovil.com/en/where-to-buy-ecoo-e0416gb-3gb

Dual-SIM dual standby *may* do what you want.

You will be able to have GPS while having any of your SIM cards engaged, since GPS is independent (as already explained by another poster) and will even work in airplane mode.

On DS standby while you are *engaged* on one SIM card (voice, there are different schemes that deal with data) the other SIM card goes into standby mode, i.e. no incoming SMS or calls or data.

While you are on a phone call with one SIM, in most cases you will not be able to receive an SMS on the SIM card, but you *will* receive any SMS sent to you while you were on that call as soon as you hang up (on DS dual standby), since the provider buffers the SMS and sends it once the SIM card is available again. Some Dual SIM Dual Standby schemes may work slightly different.

Here is a phone with Dual SIM dual active (be careful, different model versions and different features, some may only have Dual SIM dual standby):

http://www.asus.com/Phones/ZenFone_2_ZE551ML/