sure thing A dual-SIM would be a great selling point, some users are willing to shell out real money for that feature. And it would be supported genuinely by modem cmdset. BOM cost minimal Could even compensate the additional 2.5mm ;-P - since user doesn't need to carry a second phone but only a slightly fatter Neo900. And those 2.5 would not only make some comfortable space for juggling sim-holders and modem, that mega-extension also makes space for a lot of new stuff we never even though of yet. * embedded real backup battery for comfortable hotswap of main battery * all sorts of radios * prototyping area you can use as you like * a second modem module?? * walkie talkie * HDD * SSD * laserpointer ;-P * phat speakers? * you-name-it (disclaimer: this is a brainstorming list, with very limited feasibility evaluation, just no absolute nonsense in there. And of course not all at once will find space) comments welcome /j