We have now implemented a new process to get a developer certificate for RDA devices. I've posted the usage instruction to here:
At this time we can't guarantee that the root cert is already pre-installed to all the devices, so you might have to use the provided installer (see step. 4 in the instructions. But the intention would be to have it already preinstalled on the devices). Anyways, I'd like to get some feedback on this topic. Do you find this useful, are the instructions clear enough, are there usage problems etc.