Adds analyst comment, updates prices

** Ericsson ERICb.ST and Nokia NOKIA.HE fall sharply after reports flagging potential risks from Nvidia NVDA.O developing new technology for future mobile networks, say traders

** A Dagens Industri article cites an ABG Sundal Collier report saying the U.S. chip maker is developing a chip for the radio unit in 6G mobile networks, something that in the long run could be negative for the two telecom equipment companies

** Commenting on a Light Reading report about Nvidia working on a 6G radio chip with Marvell Technology MRVL.O, Danske Bank says Ericsson's technology could “start looking as legacy or even become obsolete in the longer term”

** On the other hand, Nokia could “scale back on ASIC development costs”, Danske writes

** Ericsson and Nokia are not immediately available to comment

** Shares both down more than 6%