tommy@t.om.myy declared for all the world to hear...
> I've got a contract phone myself and I've signed up for a second mobile
> phone contract with 100% cashback. I got the contract just for the free
> phone and the sim is sitting in a draw.

Make sure you use the SIM a few times or the dealer you bought it from
will get a clawback for dormancy. This may in turn be passed on to you.

> Just wondering, how many contracts can I take out before I start to look
> uncreditworthy?

That will depend on your credit score. There is no finite limit.
--
Regards
Jon