Question about Sony Ericsson Walkman W810i Cellular Phone
The only possible solutions are Replacing/Refreshing the Sim IC and or re-soldering the Sim Card connector. The dropping might have cause internal damage to the PCB (Circuit board) and the sim ic or the sim card connector (pins) might have become loose. If refreshing or resoldering the sim ic/sim card connectors don't help, jumper trick might also helpful. Just to make sure before you take it to a mobile repairing shop, try cleaning the sim connector using a cotton but dampen with Acetone or Spirit. You can also use alcohol.
I am sure that it's not the sim card, but the handset which is having the problem. This is a common issue and sometimes neither sim card works. You were lucky that the other sim card worked for a while.
I can confirm that this can be repaired but needs to be done by an experience/certified technician. It's not recommended to try yourself without proper knowledge and experience, you might make another mistake and cause another damage.
Let me know if you need further help.
Thanks for using FixYa.
Posted on Mar 12, 2011
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Posted on Jan 02, 2017
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Sep 13, 2014 | Cell Phones
Oct 21, 2013 | Samsung Cell Phones
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
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Again, if you were familiar with cell phone technologies you would know that CDMA phones do not use SIM cards. Only GSM phones do. CMDA carriers like Verizon, Sprint and Alltel will never have SIM cards in their phones. The contacts are stored directly to the phone and in the case of Verizon, you have Backup Assistant which sends your contacts to a safe place.
Carriers like AT&T and T-Mobile are the only carriers that use SIM cards since they are GSM companies.
Oct 18, 2007 | Samsung SCH-u740 Cellular Phone
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