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Did you buy the Doro second hand? If you bought it brand new take it back to where you bought it and they should be able to sort it out for you, often free of charge.
If you bought it second hand you'll find most mobile phones are 'Locked' to a specific network so you have to buy one of their sim cards. A sim card from another network will not be recognised by the handset and it will give you the "Invalid" message you're getting.
Try this. Turn off the phone, remove the sim card and turn the handset back on without the sim in it. Don't worry this won't damage the phone. There should be a logo or name on the screen showing who the registered network is. If the network is different to the sim card you have the phone won't make calls or send texts.
There is a reasonably easy, (and often cheap), fix for this. Take the hand set to a good phone repair shop and for a small fee they should be able to 'Unlock' the handset to where it will accept any network's sim cards.
If the Nokia E63 says Insert Valid Sim means it locked to network...You need to unlock it...You can get the unlock code from the site onlinegsmunlock.com and unlock it from network lock.
It the Phones says invalid Sim card means it locked to Network you need to unlock it from the network lock,you can get the network unlock code from here Mobile-unlocker.com and unlock it from Network lock,then you can use with any GSM Network Sim card in the Phone.....You need to find the network and country it locked now and specify that to get the unlock code....
It shows Sim Error or else Invalid Sim...Or even though Sim Inserted it asks "Insert Sim" If it says anyone of the error like that means Your Mobile is Locked To Network ..You need T Unlock it to insert other Network Sim GSM Sim Card.... It may locked to some Network....You can get the code here http://www.superunlockcodes.com/supported-phones/rs12wp7/ and Unlock the Mobile from the Network Lock.... I hope..You got solution...
i have the same problem i keep on putting my sims in (one tesco sim & one voda phone sim) and it said the same thing invalid sim. the sim regestars for about 2 seconds then it either says invalid sim or emergancey calls. whats a matter with it should i send it back.kjr2502
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