Quite good with teething

I have the phone now for 1 day. From the outside, everything was great, Bedinung a dream. But I have not been able to make calls with my Aldi Talk Sim. There always comes the message at startup: "This device can only be used with a specific mobile operator, please inquire at the wireless service provider to get the unlock code.". Which provider should I judge me, to AldiTalk of my Sim?
Is branding - I have specially taken without one ...
But I can come by breaking off to the side with the tiles, but do not have a network.
WiFi works but?!?

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After contact with the seller, I learned that he has the code, it works !!!

Then, if I try, my Contact Power of the SIM card to import, happened a long time nothing, the screen darkens a bit, the charging dot come, and in the background I see:
"Contact Power impotieren from:
Select an item

and
Contacts memory in:
Select Element "
But I can not, because the screen is dimmed.
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I transfer the contacts via Bluetooth, after the software update runs of Sim import

And if I want to download Whatsapp and other similar apps, always comes "This error code may provide clues: 70490 800". Even after a full reset I could not fix the problem? Can anyone help me?
(1 hour later)
Meanwhile, the Synchronisation is not possible anymore with my Microsoft / Outlook account, the error code is 800740CF

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After a software update all super runs.

+ Positive on Nokia Lumia 635:
-lauter speakers
-Good display
-handlich
-RAM Is sufficient for normal operation of (Whatsapp, web, Tempelrun etc.)
-Good Desing, battery flap fits perfectly
-Very good battery
-No Nerve notification LED
-stable
Software easy to understand, Bedinung (settings but not)
-the price

-Schlechtes To Nokia Lumia 635
Speaker-opening a small circle on the back can be covered with your hand soundproof
Speaker overridden easily
-Unübersichtlich With Microsoft, Nokia, web, etc. Accounts
-Brauchte 7x reset to right attitude
-Dachte The beginning SimLock (see above)
-Plastik Cover
No front camera

For all the perfect phone who want to have a Windows Phone, which works well but does not have 300 loose. Apart from teething when setting, the speaker and the Missing Camera a good throw from Nokia