Question about Palm Treo 650 Handheld

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Palm treo 650 wont get service

We have service through cingular and the phone says that "cannot use phone with sim card,SOS calls only. what can i do?

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If the phone is new to you, (different story if it was working on cingular before .. let me know if it was)
It sounds like it is sim locked, the phone needs unlocking.
If you can contact the previous owner and ask them what network it was on and borrow a sim card from that network it will verify the phone isn't faulty or blocked
The previous owner may be able to get it unlocked for you via there provider else somewhere like www.650unlock.com will do it for about $15 (I'm not recommending them, just one of the first in a search) Its worth googleing "treo 650 unlock" and shopping around also check 650 forums for recommendations

Best of luck

Posted on Jun 08, 2008

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Posted on Jan 02, 2017

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1 Answer

Hi how to unlock my palm 650 to used outside of USA


You can use the Unlock code to Unlock Your Palm-One Tero 650 model Phone,You can get the Unlock code from here
Wickedunlock and follow the instructions and Unlock it step by step..
Palm One Treo 650 Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Palm One Treo 650 mobile phones. If you enter over a certain amount of wrong unlock codes on your Palm One Treo 650 mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Palm One Treo 650 with an ACCEPTED SIM Card,
2 - Go to Menu and select "Phone Tool" or "Phone Application",
3 - Type on Virtual Keyboard *#*#CODE#,
4 - Select with PEN "Numer" and Palm One Treo 650 will show that it's unlocked now!

or

1 - Switch ON your Palm One Treo 650 with a NOT ACCEPTED SIM Card,
2 - Enter the Unlock Code we send to you.

or

1. Remove Palm One Treo 650 battery, unplug cable,
2. Switch ON your Palm One Treo 650 with a NOT ACCEPTED SIM Card,
3. 'Sim not allowed' is displayed, click OK,
4. Go to the dial pad, and dial *#*#CODE#,

CODE: The unique unlock code for your Palm One Treo 650.
ACCEPTED : We mean, to use a sim card from the network your Palm One Treo 650 is locked to.
NOT ACCEPTED : We mean, to use a sim card from a network other than the network your Palm One Treo 650 is locked to.

Jul 10, 2011 | Palm Treo 650 Smartphone

1 Answer

Unlocked Treo 650 wont send text messages


I have the same problem using an unlocked Treo 650 on O2(UK).
One thing you need to do is make sure that the Message Centre Number is set correctly for the SIM network you are using. Get the MCN from the internet, then on the Treo Messaging > Menu > Options > Preferences > Network > Manual > Edit to check/set the MCN.

Oct 01, 2009 | Palm Treo 650 Smartphone

1 Answer

My voice drops out on palm treo 650


Sorry, no solution - just some added info. I have the same problem with a Palm Centro. Changed sim card (O2) but no improvement. Palm eventually replaced Centro, but fault persists. Anyone with similar problems / solutions?

Sep 13, 2009 | Palm Treo 650 Handheld

1 Answer

Palm treo 650 phone


Greetings to all. I have just purchased a palm treo 650. It was unlocked so I was told, but it was not a GSM, It was a CDMA, My carrier is T Mobile and I dont know what I could to Make It Work, as t mobile has a sim card and this treo 650 does not. Is there any thing I could do to solve this problem?


Aug 28, 2008 | Palm Treo 650 Handheld

1 Answer

Phone problems


This sounds like you have a locked phone to a service provider other than the one you have an account with.

If this is the case (i.e. locked to Cingular and you have a T-Mobile account) you will need to purchase an unlock code from an online service ( try 650unlock.com. They worked for me a number of times and aren't terribly expensive). Once you have the code (this is a subsidy unlock and not a SIM unlock. SIM unlock will only unlock the SIM card for use where the subsidy unlock will enable any SIM card to be used with any service provider), follow the directions and POOF...your phone will be unlocked. Takes about 30 minutes.

May 27, 2008 | Palm Treo 650 Handheld

1 Answer

No service


call provider.

May 20, 2008 | Palm Treo 650 Handheld

1 Answer

Palm treo


If all contacts are on computer, I'd pull out sim card and do a hard reset:

http://search.active.palm.com/?q=hard+reset+palm&x=0&y=0

May 20, 2008 | Palm Treo 650 Handheld

1 Answer

Help please


hi dear

BACK UP your Treo 650 software and data BEFORE doing the following.

1. RESET the Treo 650 back to default set by holding power buttom following by reset the treo.

2. There is a way to reset the voltage regulator in the Treo ; believe is by holding the RESET for > 3 seconds. Believe need to take out the battery in out during this process. Can't recalled the correct steps. This could could reset the Treo's power regulator.

3. TRY reinstall your palm software with minimun software or 3rd parties one, this software could be running in the back ground which drain the battery.

Try above steps might help.

Mine also got the same problem last two weeks, my treo could felt there is kind warm sensation if it took out from my waist pouch after leaving it for sometime on the table. BTW, the battery could felt quite warm also.

If yours also behave the same which I believed the Treo got some kind of contact problem which draw more power then usually does.

Now, mine got no more warm sensetion after carry out above steps. It gets better as Compared to last two weeks ago BUT not that good as compared previously when it can last 3~4 days after a full charge.

Good luck

Mar 17, 2008 | Palm Treo 650 Handheld

1 Answer

Please help!!!!!!


The phone may not be compatible with cingular service.

Mar 17, 2008 | Palm Treo 650 Handheld

1 Answer

Unlock code for palm treo 650


sign up at mytreo.net I was able to get an unlock code program for my treo 600 there

Jan 06, 2008 | Palm Treo 650 Handheld

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