Custom ROMs for a phone that literally just came out? Even on Android it takes longer than that...
The Lumias currently have no bootloader unlock available, so we can't use custom ROMs on them yet. There are people working on it, though.
As for side-loading applications (this download being a PC app to help you do that), it's possible on the Lumias but currently you need to get an AppHub account from Microsoft. There used to be other methods, but Microsoft has shut them down. People are also working on finding new ways to do this unlock (called dev-unlock).
Can you list the option we have please? How do you send a xap to your phone withouth PC? You download it and where does it go, which folder?These days, you don't even need a PC app for XAP deployment if you phone can be interop-unlocked, except to deploy WP7 Root Tools and XapHandler.
Deployment FAILED with the following ERROR: Failed to connect to the device. Ensure that the device is completely booted and is connected to the PC.
why there is no sollution for this ? WHY ?
Oh, I was just to lazy to do any fixes for the emulator. Primary target was device deployment. To fix that one you have to modifiy %ProgramData%\Microsoft\Phone Tools\CoreCon\10.0\addons\ImageConfig.en-US.xsl. Search for WM701C.en-US.bin in there, and replace it with the correct path.Error: Cannot open file 'C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.0\Emulation\Images\WM701C.en-US.bin'