Sprint sim card not working for unblocked at&t phone

Are you sure the phone uses a SIM card at all? Unless something has changed recently, Sprint phones do not use SIMs. You would need to speak to Sprint to confirm.

If you get an alert about the SIM card in your iPhone

1. Make sure that you have an active plan with your wireless carrier.
2. Update your iPhone to the latest version of iOS.
3. Restart your iPhone.
4. Check for a carrier settings update. Go to Settings > General > About. ...
5. Remove your SIM card from the SIM card tray and then put the SIM cardback. ...
6. Try using another SIM card.

https://support.apple.com/en-us/HT201420

These directions are for an AT and T phone, but other than that would be the same for any carrier.

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from your phone carrier to unlock your SIM card.

You can obtain your phone's PUK code from your carrier in one of these ways:

Log in to Your account.online

Use a Technical Support Chat

Contact your carriers Customer Care

Get Your Phone's PUK Code Online

Go to the Phone/Device page.

From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.

The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator

Dear Rockerman07:
A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from AT&T to unlock your SIM card.

You can obtain your phone's PUK code from AT&T in one of these ways:

• Log in to myAT&T online
• Use our Technical Support Chat
• Contact Customer Care at 1-800-331-0500

To get your phone's PUK code online:

1. Log in to myAT&T.
2. From the myAT&T tab at the top of the page, hover over the Wireless link and select Phone/Device under the My Wireless Service heading.
3. From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.
4. The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code

Thank You Margon65

See this post:
http://mobilenetconnect.com/unlocking-an-audiovox-cdm-8910-cell-phone/

My friend you cannot use the LG Fusic to a T-mobile network since your phone is a CDMA phone & Tmobile is in a GSM network.

95% of all CDMA phones doesn't support a sim card & the remaining 5% that supports a simcard could only use the sim card from it's original CDMA provider.

GSM phones are phones that supports a sim card.

Hope that'll help you..

Happy Holidays...

**please rate my post**

try to reformat the sim before inserting it in phone. also make shure to not exceed sim memory size or speed.

the only reason that its not working is because Sprint locks their SIM cards so that you cannot use them on any other carriers. but it is possible. all you have to do is take the phone to AT&T and have them flash the phone to AT&T. another reason it won't work is because sprint is CDMA service, and AT&T is iDEN network and GSM. they aren't compatible. so you are unable to use the sprint SIM card in the AT&T phone. i am sorry.

enter ##786# push ptt buttom and reset phone!