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Unlocking and SIM freeze are similar. Screen freeze is completely different.

There are many connections which have such problems. It is better you check the variation of the speed in the morning and evening using IP-Details and report it to your ISP.

Sure Airtel is the best. I second the previous user. BSNL has no good customer service also. Its a waste.

Yes even i unlocked my mobile at for free.It displayed mobile unlocked. It will also show like network unlocked .

I dont know about speedtest.net. The best solution to your problem is to check your speed in many other speedtest sites like this is where i check my speed.