Thanks for the info and great to hear that btw, can we get full speed when plug into this modem? Assuming the ISP supports such a high speed...

impossible to get full speed, as current non of the telco ISP provider provider FULL HSPA+ yet,..

The reason I'm asking these questions is I found out that my wireless broadband actually runs slower when plug into a 3G wireless router. I can get >4Mbps when run it directly from my laptop but only ~3Mbps on the router. This makes me believe that 3G wireless router could slow us down if the firmware is not good enough.

So, I'm considering MR3420 right now in order to get back the "original" speed and at the same time, wondering if I can get >7Mbps with this UMG1831 since my area is within U mobile 42Mbps coverage.

I'm using Siera 885 right now which only supports up to 7.2Mbps.

I also faced the same scenario when using stock firmware. The download speed is very slow when connected to router. After I changed to OpenWrt firmware, I get full speed like when connected directly to my notebook.

Can u do some tutorial how to install OpenWrt firmware ?
Which Web interface LuCI or Gargoyle noob friendly ?

Bought MR3420 today but frequently fail to identify my Sierra 885.

Updated to latest firmware but didn't help.

So, no choice have to use my MF190 for sharing my internet. However, i notice that the speed is slightly lower than directly plug the modem into laptop.

May be have to flash OpenWrt firmware...

After reading thru the instruction for OpenWrt firmware, i decided to stay with stock firmware The steps sound too complex...

This post has been edited by ks98: Mar 3 2012, 10:55 PM

Flashing OpenWrt firmware is very easy. But after flashing OpenWrt firmware, you need to do initial configuration. This is where your basic knowledge on linux in text-mode will be needed. This is summarized version on how to do the initial configuration:-
Which firmware I use (for no. 2):-
I don't know. I only use LuCI & it only need minor configuration.

1. Network > Interfaces > (add interface for 3G)
   
2. Network > Wifi > (add wireless)
   
3. Network > Firewall > (add 3g zone)
   

This post has been edited by kizwan: Mar 4 2012, 02:01 AM

i still not able to run the AT command to disable autorun, how come? i even change the drive to the modem to give it a try, but command not valid...hmm..i try many times also same..how come?

You should connect to 3g modem COM port using Putty or Hyperterminal. Follow the PDF file at first post.

ok finally got it..the problem is i use the wrong COMP no.

Thanks kizwan

er...home come it still autorun after i successfully disable it in PuTTY?... em..

This post has been edited by JayC75: Mar 4 2012, 03:03 PM

You're wrong.
I got 21mbps from 1831 when I had it for a week.
But it was unstable cause of bad firmware.

---

Added on March 4, 2012, 4:01 pmCheck if the 3420 has a modem file for the sierra 885.

This post has been edited by MYstombox: Mar 4 2012, 04:01 PM

every modem cannot go 100% ALL TIME of FULL SPEED, sorry i disagree with you on this,.. plus the current HSPA+ is not FULL HSPA+ ,..

i believe what u getting is spikes to up 21Mbps ? how long the 21Mbps speed last ? 1 min ? 1 week ? LOL

This post has been edited by chuahcs79: Mar 4 2012, 04:03 PM

Don't understand what you mean by full HSPA+, maxis offers HSPA+ up to 21mbps. And if you can hit that, it already means it reaches the theoretical max. What other 'full HSPA+' do you mean?
Because clearly the telco does support the speeds.

Theoretically, HSPA+ supports up to 168Mbps of download speed and 22Mbps of upload speed.

For Maxis, even they're using the same technology but it supports only up to 21Mbps.

That's just a sudden burst.
We haven't implemented 21Mbps yet, for Maxis at least.
So far only U Mobile has.

how stable is this OpenWrt custom firmware..

For me OpenWrt custom firmware very stable. With tp-link firmware 3G always dc after 1 hours or WLAN connected but no internet.

I'm using kaskus version Firmware V.1 Openwrt by Mang + update Firmware V.1.2.

Not sure if anyone has shared this before, but here goes:
http://mybroadband.co.za/vb/showthread.php...ink-3420-router

Apparently, someone from TP-Link provided a link for a tool called USB Sniffer to create the modem bin file for most modems that aren't able to detect on MR3420/MR3220. If you're into the technical stuff, I'm supposed this is worth to look into.

One thing to note is that folks in the forum mentioned that the tool only works in WinXP. Good luck!

This post has been edited by maxcheam: Mar 5 2012, 05:08 PM

Here is the exact link for the USB Sniffer, ftp://tplink:wr641g@ftp.tp-link.com/Temp/...r_Guide_105.zip.

This post has been edited by ks98: Mar 5 2012, 05:58 PM

TP-LINK_3G_USBSniffer_Guide_10.zip mirror
http://www.4shared.com/zip/Pzou9EOD/TP-LIN...r_Guide_10.html