Question about Samsung SGH-t629 Cellular Phone

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My phone powers up and everything, but it won't find the network.

I spoke to Tmobile, and we tested the Sim card, but they had no solution. Why would my phone all of a sudden not be able to connect to the network? Otherwise the phone works fine.

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Sylvester Brathwaite

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You will need to have the network on the phone either tested or the phone reflash.

Posted on Aug 24, 2008

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My blackberry curve sim card tmobile keeops saying invalid sim


Your BLACKBERRY 9630 TOUR Locked to network ,So you need to unlock it from current network lock to use other GSM Network Sim card....Visit the site
Theunlockarena.com/blackberry/rs13wp8/ get the unlock code and unlock it easily.Then use any GSM Network sim card...You can't Unlock CDMA Network locked Blackberry Phone.Only GSM Network locked Phones can be unlocked easily.

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Can i flash a sprint lg phone to be used on tmobile prepaid


No. They use 2 totally different networks for service.

Sprint is cdma based which means no sim card. Tmobile has to have a sim card to work, and sim cards don't work on cdma

Aug 29, 2011 | Cell Phones

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I have a contact sim card with Tmobile, but as my phone i got with the contract broke and they wanted me to pay for repairs, i just now use the sim in a different phone (unlocked vodaphone one). But now i...


Goto your phone's network/internet settings and try the following:
  1. In the APN field, enter either epc.tmobile.com (or internet2.voicestream.com if that doesn't work) -- this tells T-Mobile which version of our Internet network you want to connect to.
  2. Leave the Username and Password fields blank -- T-Mobile will assign this information based on your SIM card information.
  3. Return to the Main Menu and open your browser to browse the Internet.

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I have a few cell phones that used be with Tmobile, ATT, and Alltel. I've seen ads that say buy a Motorola sim card for unlimited everything $50. If I put that simcard in my Motorola Razor would it work...


If the handset isn't locked to those three networks i.e. Tmobile, ATT and Alltel, then any sim card will work. Almost all handsets are locked to certain networks and so we can't use sim cards of other networks. You can verify this in only one way. If you have a sim card of another network (in your hand at the moment or you can borrow it from your friend or from other family members), you can insert the sim card, suppose a Verizon sim card, not those three. If the verizon works, then all sim cards should work on your handset.

Since your phone already works with Tmovile, ATT and Alltel, I hope all other network sim cards should work without any problem. Suppose if a phone is locked to network means, it's locked by the Service Operator to preserve their customers so that the customers will return to them if anything happens with the sim card or with the phone, this is a business plan logically designed.

For now, I can't confirm you, but at least if you could try with another sim card of another network (verizon) and it works, the no doubt, all sim cards should definitely work. But if you can't try it that way, I wouldn't recommend you, until you get it tested.
And that Advertisements seems a kind of something, "....unlimited everything...." sounds good, but must be unlimited Incoming Call and could also be without monthly rental fees. I don't recommend unless you ask about it to someone who already used the same sim card ($50). As we know, advertisement is advertisement.

If you need further help, let me know.

Good luck.

Thanks for using FixYa.

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Unlocked verizon blackberry world phone wont work with t-mobile


i believe i had had the same issue.

i unlocked an at&t phone and put in the sim card and it wouldnt work. i called tmobile and the representative told me that they have to register the sim card to their network or something.

so just call tmobile and tell them you got a new phone and want to register it so the sim will work in the unlocked phone.

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Unfortunately it will not work. TMobile uses GSM technology while Sprint is on CDMA.

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You must contact tmobile with the phones information. The sim is registered but Network does not reconize your phone as an authorized device.

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Well, first off, an iPhone won't work at all with a T-Mobile SIM card. American iPhones are locked to AT&T's network -- only AT&T SIM cards will work in them.

As far as activating it with AT&T, make sure that the iPhone isn't connected to the computer while you install iTunes. Once iTunes is installed, connect the iPhone to the computer and iTunes should launch automatically and begin the activation wizard. Just follow the instructions on the screen and answer the questions.

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