Great idea if it would work

Unfortunately, the app in Google Play Store is not yet to be found. However, they use a browser to the "old" Smartphone installieren.Beim fire phone that's less of an issue because the app is available on Amazon.
Even reading the data (photos, SMS, call logs) when the source device (HTC One X) runs smoothly.
Only the data can not be transferred because the fire phone always broke so far from having a connection problem with the read-in process.
All specifications of App were tested my hand several times. More solutions I have been able to find any.
The idea of ​​the app is great and if it works one day, there's always 5 star.
As long as my old smartphone remains still in the closet. ;-).

Addendum: So, now I finally got it to work. Hindrance in this case was the installed antivirus / Circuit Protection Software. After removal of the program concerned, the transfer went smoothly. Thus there by me "perfect score."