10-02-2011 04:42 AM
10-17-2011 06:45 PM - edited 10-17-2011 07:04 PM
i've done the same mod/upgrade myself on my TPT 1839 model. has anyone else noticed that if you have 3G enabled (i'm using a simcard w/AT&T USA) and the thinkpad goes to sleep for over 2 hours, the 3G does not work until the tablet is rebooted?
i'm noticing this consistently.
also, i wish manufacturers would understand what A-GPS really is and include the appropriate coordinate data for our regions or create an app that would. (does the TPT have native A-GPS or does the Gobi 3000 card add this? i know the Gobi gives my X220 Tablet GPS after adding)
10-30-2011 10:56 PM - edited 10-31-2011 02:49 AM
After following this thread for the past month and picking up my 1838-25U, I also tried to install a WWAN card. However, through searching for other alternatives to get my T-Mobile to work (which works off AWS 1700MHz), I was let to the HuaWei EM770U and EM770J modems (the EM770U is what comes standard on the T-Mobile Dell Mini 10 laptop). (http://www.cellphonesignal.com/huawei-em770u-mobile-broadband-with-t-mo-3g-band-for-dell-laptop/)
These modems are said to have worked on many Lenovo laptops, so I decided to give it a try....but no dice. Although my device now has the "Mobile Network" enabled, when I try to active the device, I get a "No WWAN device detected!" error message.
Apparently the tablet does not have drivers built-in for the Hua Wei modems. Do any of you guys have any leads or solutions? I am pretty keen on the Hua Wei EM770U device--for it supports ALL the US GSM bands from both T-Mobile (my choice) as well as AT&T. If I can get this card to work, it would be pretty awesome.
10-31-2011 01:44 AM - edited 10-31-2011 01:47 AM
I'll be in a similar situation.
Just got myself a 183825U & was planning on upgrading it to 3G.
Was wondering if a identical ERICSSON F5521gw 3G WWAN card is compatible or do I have to absolutely get the Lenovo certified parts?
Here's the picture:
Anyone tried this before?
Please advise me as they are very affordable where I'm right now & compatible with local Telco bands.
10-31-2011 06:16 PM - edited 10-31-2011 06:20 PM
I bought a 1838-25U + Gobi 3000 WWAN card MC8355(from AMAZON USA).
I opened and installed this card (thanks pdl099).
I insert my SIM CARD (TIM carrier)
I live in BRAZIL, how I actived out USA?
Where I get spare screw to secure the WWAN adapter to the Tablet?
11-02-2011 10:17 AM - edited 11-02-2011 10:18 AM
I´m not have this option "TIM", only show the (Verizon Wireless, Sprint, AT&T) and Other, I try Other:
To sigup and activate: Please Contatct your service provider.
Luiz_Felipe what your model?
11-02-2011 10:23 AM
You only need the signup/activation menu for the screwed-up US carriers. In most of the world the cell phone provider will just sell you a sim card with data. Plugging in the sim card and selecting the riight mobile network is all that is required.