xxxmandyxx

Hi I have a Samsung S2 on 02 and have had it for 4 months. recently I have a symbol at the top that looks like a no entry symbol and if I try to make calls etc it says please insert sim, the sim is inserted already but still getting this error. It has happened a few times and all of a sudden it will start working again, but I have had the symbol on for 3 days now and wondering what it could be and why is it happening.
when I go to settings>about phone>status: it says the following

Network > unknown
Signal strength > 0dBm 99 asu
mobile network type > unknown
service state > out of service
mobile network state > not connected
my number > unknown
IMEI > unknown
IMEI SV > unknown

I dont know what to do can anybody please help im lost without my phone
T.I.A
Mandy.

zoonie

Take out the sim card give it a gental wipe with a soft lint free cloth then put the sim back in your phone and reboot! This may cure your problem

puzlid

Have you tried selecting automatic network operator? Settings-more-mobile networks, then select automatic. Had the same problem would lose the signal for hours when I selected a specific operator.

cateran100

I have the same issue (Three - UK) and it`s started a few weeks ago. The sim working fine in my other mobile (LG Optimus L3) so it`s not faulty sim card. And actually the loss happens only when I`m tethering...really annoying. Unfortunately I don`t know any good solution (btw currently 4.0.4. the Android version)