Help Samsung Galaxy S2 cannot detect SIM card

[julystork]

I always get that grey icon of a sim card with exclamation mark & cannot make any calls. Restarting the phone doesn't work, neither does removing the sim card & putting it back. But imei works i.e. shows up.

Is there any possible non-rooting way to solve this?

 

[lunatic59]

First thing I would do is to try the SIM in another phone to make sure it works. If it doesn't work in another phone, you'll have to get a new SIM. If it does, then I'd suggest a factory reset. It would be a pain in the rump, because you'd have to re-setup your phone from scratch (and if you do go that route, make sure you back everything up off the phone that you want to keep).

If that doesn't work, you may have a bad radio, which means sending the phone in for repair.

 

[chrisluger2012]

I totally agree with lunatic because sometimes SIM is not working in one phone but it works on other one. You should check new SIM on your phone first if the problem remains then you should do reset your phone.

 

[rodeosweetheart]

I don't know how to do a backup on my phone do I have to write all my contacts down and reput them back in I am not a phone savy person but everything on my unlocked Galaxy s II Skyrocket GT I19100 GSM Unlocked rooted grade A & B &

My phone is not reading the sim card and I don't have another phone

 

[lunatic59]

I don't know how to do a backup on my phone do I have to write all my contacts down and reput them back in I am not a phone savy person but everything on my unlocked Galaxy s II Skyrocket GT I19100 GSM Unlocked rooted grade A & B &

My phone is not reading the sim card and I don't have another phone

If you sync your contacts with Google, then they are already backed up. If you saved them only to your phone, a new sim card shouldn't affect them. If the problem is the phone itself, then you'll need to have it repaired, but that's unusual. It's more likely you simply need a new sim card. Your carrier will have to reprovision the new sim for your phone number, but it shouldn't do anything with your contacts. Now, if your contacts are saved on the sim card (bad idea) and you can't read the sim, you might have already lost them.

 

[rodeosweetheart]

My phone is saying that the Mobile Network is not available..... then it will say insert the SIM card....I done a total factory reboot about 1 month ago with Straight talk and now I have a new SIM card and it will not read it...........what should I do?

 

[lunatic59]

My phone is saying that the Mobile Network is not available..... then it will say insert the SIM card....I done a total factory reboot about 1 month ago with Straight talk and now I have a new SIM card and it will not read it...........what should I do?

That may not necessarily mean it's not reading the sim. It could mean the sim is deactivated or not provisioned properly for your carrier. I'd give the Straight Talk people a call to check your account and that it is not deactivated.

 

[rodeosweetheart]

Thanks...I have called Straight talk every day and it does not work....anything else can I do.....should I do a factory boot again...my phone is a Galaxy s II Skyrocket GT I19100 GSM Unlocked rooted grade A & B

Will I have to put all these apps back on if so where should I go on the internet to do this..,..I am so lost on these things

 

[lunatic59]

Do you know anyone else with an Android phone? I would try putting your sim in a different phone just to make sure it works. If it does, then perhaps a reset will fix things for you. If not, the a reset really won't help.

 

[rodeosweetheart]

Everyone I know has a CDMA phone. I will try to reset it again, also I do have a Google account, do I plug my phone into the computer and will it sync automatically. Thanks for all your help

 

[lunatic59]

Everyone I know has a CDMA phone. I will try to reset it again, also I do have a Google account, do I plug my phone into the computer and will it sync automatically. Thanks for all your help

If you've got the phone set to sync and backup apps and data, then once you reset it and log into your google account, it will reinstall apps and contacts, but you'll need to enter settings for other email and apps.