I had used iBall Andi series mobile, for some time. The performance of mobile with the existing technology at that time was good. This phone has upto 3g support in it. It was a quad-core processor with clear display and just 4.5 inch display which is quite handy and user friendly.
Once my mobile became dead and I went to service centre, they told me that water had gone in your phone so your warranty is void and motherboard needs to be changed. The phone cost around 10k and for repairing they want 5k, so came back without repairing it. Than I had given that mobile to local mechanic for repairing, he just heated up phone with hot air for some minutes and phone start working again.
So service centre experience is very poor.