unlocked on at&t no 3g

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I tried to get the $15 (200 meg) data package to work, but there is no signal showing up on the phone. anyone got any ideas?

Re: unlocked on at&t no 3g

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Yeah. I have really good idea....... at&t sucks
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Re: unlocked on at&t no 3g

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They use different freqs for the different companies 3g in the states, at&t uses the "standard" freqs and tmob uses its own due to fcc regs. They may also use different flavors of 3g also(ie UMTS, HSPDA, wcdma) the acronyms are endless...

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Originally Posted by jeffbichel

I tried to get the $15 (200 meg) data package to work, but there is no signal showing up on the phone. anyone got any ideas?

Any ATT data plan should work, but only with ATT's 2G service*.

there are a few things I could think of that could be causing your problem which are separated by phone or network problems (these are all assuming your phone is searching for signal and isn't giving you any obvious errors about the sim):

PHONE PROBLEMS
1. Your MT slide is locked to WCDMA only, which won't work on ATT (see explanation below*).
2. Your unlock method didn't work.
3. Any other random prob with your handset hardware/software.

NETWORK PROBLEMS
1. You are not in a ATT 2G coverage area
3. You are in a location that the ATT 2G signal is being blocked.
2. There is an ATT network outage in your area.

The quickest way to narrow down your prob is to get a hold of an ATT phone that is working (either from a friend or an ATT store) and test your sim in that phone. that will tell you if you need to start troubleshooting your phone or your sim/att service.

*ATT uses a different frequency for their 3G coverage (ATT uses 1900 mhz and 850 mhz WCDMA as oppose to T-Mobiles 1700 mhz WCDMA). this means that if you locked your phone to WCDMA on the slide, then it is going to try to look for an ATT signal at 1700 mhz, which does not exist. Unfortunately there is no way to "re-tune" the radio hardware in most devices to operate on a different frequency, so your probably stuck with 2G only if you continue to use ATT.
the only exception that I know of is the blackberry bold 9700, in which the radio hardware actually supports all gsm/wcdma bands, and just has the "Carrier appropriate" bands enabled in the software. this may be the case with the MT slide, but I doubt it.

UMM before any of that I'M GUESSING YOU HAVE THE PROPER AT&T APN SETTINGS?? Correct?? .. if not, you need to find the att apn address and replace the stock epc address

Originally Posted by turboyo

UMM before any of that I'M GUESSING YOU HAVE THE PROPER AT&T APN SETTINGS?? Correct?? .. if not, you need to find the att apn address and replace the stock epc address

and if this was the case what epc would we need?

No clue research it Im sure its simple to find ATT APN address ..our stock tmobile one is epc.tmobile.com

if you want something to try, try this but i have no idea if this is for att's new plans

Name: AT&T
APN: wap.cingular
Proxy: leave blank
Port: leave blank
Username:WAP@CINGULARGPRS.COM
Password:CINGULAR1
Server: leave blank
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC:310
MNC:410
APN Type: leave blank

Originally Posted by turboyo

UMM before any of that I'M GUESSING YOU HAVE THE PROPER AT&T APN SETTINGS?? Correct?? .. if not, you need to find the att apn address and replace the stock epc address

The apn definately must be correct to use data once the phone finds signal and connects to ATT's network, but jeffbichel said his problem is that the phone isnt getting any signal to begin with. the apn only comes into play once your phone has already found and connected to a cell tower.

I read elsewhere that the only way to get a Slide working with 3G on AT&T is to order one destined for Roger's telecom Canada since they use the same 3g frequencies as AT&T...

You can use a TMO phone on AT&T, the 3G will not work, EDGE only. On an Android phone the APN settings must be set correctly for AT&T for the data to work.