Insert sim I just got this phone from my friend and everytime I put my sims card into the phone it says insert sim, when its already in there

Try the SIM card in a friend's phone.
Try a friend's SIM card in your phone.

Do you want to insert other network sim or if your Blackberry Curve 8350I displaying insert sim card,if already sim card inserted.Don't worry i will help you.You can insert other network sim card in the phone by unlocking the phone from current network lock.To unlock Blackberry Curve 8350I use unlock code.Visit the site Wickedunlock.com get unlock code and unlock it easily.Then insert any GSM network sim card.If the phone displays insert sim card even though sim card is already in the phone.Please remove the sim card and replace it correctly.It is because the phone didn't detect the sim correctly.After inserting if it is display invalid sim or sim not valid message on the screen.It is locked to some network,you need to unlock it.To unlock use unlock code.Get code from online site and unlock it.

Well it is either a problem with the SIM card or the phone. First you should test out your SIM card.

Put the SIM in a friend's phone. If you put the SIM card in this other phone but it still says insert sim card, then it is the SIM that is no good. If the SIM works fine in the other phone, it would be the phone that is the problem.

Try inserting another SIM, your current SIM might have a problem. You can try a friend SIM. Hope this will help you. Thanks for using Fixya.

Go to a store, and they will provide you with a new sim card. That's what happened to me. :p

take the sim out, use a plastic grocery bag and rub the sim card with the bag. Make sure you don't put your finger on the metal part.

1. Ensure sim card is inserted the correct way (sounds asinine, but it happens more than you'd think)
2. Check contacts for build-up. A quick lick on your finger (not too much!) and rubbing of the exposed gold panels on the sim card should clean them sufficiently. Then toss the finger on the contacts on the phone.
3. Still not reading the SIM? If you have a friend on the same network as you, try putting his SIM card in and see if it reads it and turns on. This will pinpoint if it is a defect in the phone or your SIM card. If it still doesn't read your friend's card, I'm afraid your phone needs professional TLC. If it reads your friend's SIM card, return your SIM to your service provider (just walk into their store) and they will chop you up a new one right there on the spot.
Hope this helps!

Sounds like phone is locked or firmware is bad

Its possible that the sim card on your phone is not properly placed or the sim card that you own has some problems already.

Try to reinsert your sim card, this time make sure that it is properly placed. If the same happens, try to use a different sim card on your phone. If there are no problems, that means your sim card might be busted already. If the same happens with another sim card, then it is possible that the slot for the sim on your phone is defective or dirty. You may need to have it checked. :)

its the contact of the simcard to the leads. try putting a thin piece of paper over the sim so that there would be pressure on the sim. as always, think of the contact.