@User, am not seeing anything wrong with the phone having two lines. The only problem is that it has no color in the screen.

Now, put Safaricom and Airtel at the sametime and seee what happens after removing the memory chip if it has one.

Tembea River Road upate watu wa kukata na ku re-assemble sim card!

Let's just say, there were dual sims long before there were dual sims - If you know what I mean.

Some things have to be seen to be believed!

These guys of "ni software mbaya" can some times be serious engineers!