AnonD-515615, 18 Mar 2016Thanks a lot 'exec'. I've followed your instructions and disabled few LTE bands. Situation is ... moreHehe my mistake, because '8' and '2' is not in the same place in phone dialpad, and computer keyboard.. mea culpa :D
Yes you can flash any ROM to brandet at&t Lumia 640 lte. For more info you can check 'De-Brand [ATT] Lumia 640 LTE' on xda dev :)
Thanks a lot 'exec'. I've followed your instructions and disabled few LTE bands. Situation is better now. However, I've found that there are only 4 WCDMA bands B1,B3,B4 and B5. I am assuming AT&T disabled other modes/bands in their ROM. Also I guess one GSM band is missing too. Do you know how can I set up/ modify the ROM to get these other missing bands back?
Also the code for the hidden menu is ##3282# , not ##3828#..... :P.
Your english is good, no worries...
AnonD-515615, 17 Mar 2016I bought Lumia 640 as AT&T go phone but got the unlock code from them. After unlocking I i... moreAT&T Lumia 640 ROM disable "highest connection speed", from phone settings. Maybe is the problem with LTE 4G/3G network coverage, and by default all LTE bands are ENABLED in at&t Lumia 640. If you want to turn off some bands (to have only 3G or 2G connection for better signal strength), you must enter code for hidden menu: ##3828#, accept, tap on free dots in lower right corner, settings, network select manual,then check the following: (Or you may select only one on this bands):GSM DCS 1800, E GSM 900, P GSM 900, GSM 850 , GSM PCS 1900 - this is for 2G... For 3G is: . B1-WCDMA 900,B8-WCDMA E/J 2100 or WCDMA 1800. Sorry for bad English :D
I bought Lumia 640 as AT&T go phone but got the unlock code from them. After unlocking I inserted my sim which is from Lycamobile ( they use T-Mobile network). But there is a problem with the network. I notice that the phone goes out of the service/ network in every 25-30 seconds and remain there for 3-5 seconds. There is no problem with Lycamobile network in my area as I am currently using Moto G 2nd generation without any issue. Anyone knows what the problem might be and what can I do?
FYI: The phone is in win 8.1. I already bought 2 of them and both behave the same, so they are not defective for sure.
3 months using this 640 LTE in Indonesia. Just 4 days ago join Windows Insider and updated to Windows 10 Mobile with the latest update (.164). All went smoothly. Thats not an official update from Microsoft but it tastes like its official update.
Battery's running very good obviously.
Highly recommended. Hope the official update will be much much better.
Anonymous, 09 Mar 2016What insider doesn't have Android Apps! Windows APps are very different...Well, yes they're different, but now I read a few review about Android apps on WP 10. Looks like they turned down that project..
exec, 11 Mar 2016Is it official update or via windows insider app, because i also have Lumia 640 from AT&T,... moreJust unlocked this phone from AT&T running Windows 10 Insider Preview and it's doing well so far. You need to install the Windows Insider app from the Store and choose your ring to be enrolled into Windows 10 installation. Enjoy!
exec, 11 Mar 2016Is it official update or via windows insider app, because i also have Lumia 640 from AT&T,... moreWindows 10 mobile is not available for all devices as yet but you will be able to get the update on your ^40 when it is made available to that device
Hello This or Samsung Core Prime? i try both but not sure which last longer.
Windows 10 is the ugliest Mutt i ever seen on a phone! What a Mess!!!
AnonD-512756, 09 Mar 2016Finally i get windows 10 :'D Lumia 640 AT&TIs it official update or via windows insider app, because i also have Lumia 640 from AT&T, unlocked, and still no update. Btw phone works really good here in Bosnia & Herzegovina
AnonD-209238, 05 Mar 2016Been using the Lumia 640 LTE for almost a week now. And all I can say is that it's totally wor... moreWhat insider doesn't have Android Apps! Windows APps are very different...
christian, 01 Mar 2016can someone tell me if this phone makes video call in messenger??Hi, Christian!
No, you can't make video calls with this device on Facebook Messenger, and I think that you can't even do that with other Windows Phone devices with WP 8+, because it doesn't support this feature (the application).
Been using the Lumia 640 LTE for almost a week now. And all I can say is that it's totally worth the money.
Camera ir pretty amazing for the price, the speaker is pretty loud and the internal memory is enough for me, and a big plus is that you can add a SD card. The 4G network signal is pretty strong too, sometimes it drops in some places, but mostly it's good. The Snapdragon's 400 performance is also amazing, I can play games like: Asphalt 8, Modern Combat 5, Dungeon Hunter V etc, with some frame drops here and there, but it's quiet satisfing. And the front facing (selfie) camera and it's 0.9MP is dam* good too, well, in lower light conditions it makes some imaging noise, but not too bad.
The display is quiet high quality and the out-door visability is good, but could be a bit better.
In one words, for early 2016 it's a very good phone for daily use and if you are still thinking to buy it, sure go ahead. And if you want some Android applications on this Lumia just use Windows Insider and install Windows 10 Preview build and you can easily install Android APPS trought your PC easy as pie.
christian, 01 Mar 2016can someone tell me if this phone makes video call in messenger??Not sure about 8.1 but if you install windows 10 preview then skype would be your video calling app.