Airplane mode doesnt turn off cell stadby

Hi. I have samsung S2 which lost its ability to detect SIM card recently. I did factory reset two days ago but it has not helped. I would like to use it like small tablet for browsing at home. The device has official android 4.1.2 kernel version 3.0.31-1156082 dpi@DELL175#3 SMP PREEMPT Mon Apr 22 16:13:38 KST 2013; Build number: JY054K.I9100XWLSS).

Everything would works well but there is one unpleasant problem with enormous battery drainage even if the device is in airplane mode with wifi off, bluetooth off, synchronisation off, GPS off, power saving on. The culprit of this drainage is CELL STANDBY that I am not able to turn off. Turning on airplane mode has absolutely no effect on CELL STANDBY and its effect on battery dainage.

Is there any way how to turn off cell standby?

TheImpossibleEnemy said:

Why didn't you tried to fix this sim card problem in the first place?
I bet these problems are somehow related.Reflash stock and see how it goes.

Click to expand...

Click to collapse

I dont know how to repair that problem with SIM card. It was the phone of my brother. He droped the phone in a soup accidentally. The phone was working after that accident approximately 7 days and then suddently lost its ability detect SIM card.

TheImpossibleEnemy said:

Oh,so it's a hardware problem.Maybe try doing a factory reset.

Click to expand...

Click to collapse

I did factory reset but it have not solved the problem.