I don’t know if my Google-fu is failing me but there’s nothing else on the interwebs about RM707 except phonescoop’s FCC approval register.
On the ID label portion, the above image is seen. Labelled RM707 it bears the same shape as the Nokia X7.
There’s also an OET List Exhibits Report that shows that the external and internal shots (submitted on the same day as the ID label) won’t be available until August 29. So does that mean the X7/rm707 won’t appear until after that date? Perhaps a Q3/Q4 release with Nokia World?