Buying tablets without operating system

Hi!
Do you know if there is an ability to buy for example 100 tablets without operating system? Our company have to use its own modified ROM. Every time we root device and install modified Android we break warranty and we would rather like to avoid that.

p94

HELP! Operating System deleted on my HTC ONE X and touch screen not working

I accidently deleted the operating system on my HTC ONE X, I had tried to jailbreak my phone but after doing so my phone started freezing so I attempted to delete the jailbreak and now my phone has no operating system I can get to the Team Win Recovery Screen but am unable to press on anything as my touch screen is unresponsive. The version on my phone is v2.4.0.0. Any help to get my phone back up and running would be greatly appreciated :)