High res would have been nice -- blending of the phone and the wood is hard to see with the grunge background and the single color. Try masking the wood over the phone then try various blending modes (a layer in overlay mode with a copy above in multiply is usually a good spot to start) Then play with the fill or opacity levels
PS . Look for a better wood source the one you have now is too blurry and will not blend as well as a sharper image -- good luck

Is it also a wooden hand ?

Nice effort.....

I think the splash layer has to be under the hand layer...

GL

agrees with Alan