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Optus won't accept my unlocked telstra samsung sgh-a412, why?

I was with testra then used amaysim pay as you go. i have two phones now with amaysim (no problems) and even transferred my old telstra number. when i try to connect this particular phone through amaysim, optus refuses to acknowledge the phone but asit is familiar to me and i like it i would like an answer as amaysim pay as you go is so much cheaper than telstra, and i would also only need one phone.i am not phone savvy and my grandkids say my old ph. is a dinasaur. Thanks for any help, loraine

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It may be due to the radio frequencies that Optus use being not be compatible with the Samsung sgh-a412 available operating radio frequency range. TThe mobile data radio frequencies may be different and the phone might not work on the radio frequencies used by Optus.
The Federal Government sells radio frequencies to each carrier to use and there may be a problem with the Samsung-a412 working on the Optus allocated radio frequencies assigned to Optus.

from further research on my part
The phone you have uses utms 850 mega hertz radio frequency G3 mobile data and this frequency band is not used by optus they use utms 900 mega hertz radio frequency G3 mobile data .

Posted on May 26, 2017

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Samsung Mobile Phone SGH-A412

Is there a on line book of instructions for the a412,
Its a lot more complicated to use than my previous mobile
maybe some bright person can help this old fool

Posted on Mar 24, 2008

SOURCE: Samsung SGH-A412 Message Alert

You can convert them to mmf files then use them the same as any of the other files already on your phone

Posted on Apr 28, 2008

  • 1 Answer

SOURCE: unloc telstra phone zte f165

network code

Posted on Jul 02, 2008

SOURCE: Hi Phone

nub nub

Posted on Aug 01, 2008

shaggy067802
  • 76 Answers

SOURCE: Samsung SGH-A411 Network Unlock Codes

Type *#9998*627837793# Go to the 'my parameters' and there you will find new menu where you can unlock phone.(not tested-for samsung C100)
To unlock a Samsung turn the phone off take the sim card and type the following code *#pw+15853649247w# .
Java status code: #*53696# (Samsung X600)
If you want to unlock your phone put a sim from another company then type *#9998*3323# it will reset your phone. Push exit and then push 7, it will reset again. Put your other sim in and it will say sim lock, type in 00000000 then it should be unlocked. Type in *0141# then the green call batton and it's unlocked to all networks. This code may not work on the older phones and some of the newer phones. If it doesn't work you will have to reset your phone without a sim in it by typing *#2767*2878# or *#9998*3855# (not tested)

Posted on Jan 28, 2009

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