so dont use the latest one? means use the one before it? 120905 is the latest.. so use the 120703 instead? PM me how to flash please thanks.. newbie here

Sifu , another test proven that the best for my 680 is leave it untreated .

the last 3 rows result is tested with "680 + panel + mdma @ -61dBm" vs the top 3 rows with "680 + mdma @ -81dBm" ( I dismantled the panel ) >> without panel and inferior dBm , my speed improved ~40%




Attached thumbnail(s)

Maybe your panel antenna...
- not facing tower or..
- panel antenna cable got a lot of interference or..
- connector not attached properly


This post has been edited by ibnuasad: Nov 21 2012, 08:07 PM

as you can see , with panel attached, the RSSI improved quite significant @ -61dBm , and my last post on 3420's signal strength is about 77% , without panel , my RSSI only -81dBm and signal strength is about 45%

Did you faced the wrong tower

bro , I dunno , I just position my panel in order to get the best RSSI , or should I try all angles irregardless of what RSSI I get ?

If signal strength increase but slow speed, its either:
- Facing another tower or...
- Most likely its panel antenna cable...maybe high interference or low quality cable..

This post has been edited by ibnuasad: Nov 21 2012, 08:42 PM

any1 here using MF680 with TL3420 router...can post out what the speed you guy get?

My result without panel = speed is up down not stable at all.

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Added on November 21, 2012, 9:33 pmas per your request:

zte mf680 + Panel antenna + V1 + V2

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Added on November 21, 2012, 9:35 pmu need to use MDMA to helping you finding which tower exact CELL ID, so u know which is high speed in distances by SNR & RSSI

This post has been edited by chuahcs79: Nov 21 2012, 09:35 PM

Bro chuahcs..
If just mf680 and tl3420.. what the speed... dun include 1more router and extra antenna

Today...suddenly my laptop and iphone cannot connect to the wifi. I didn't do anything. just out of a sudden.

i tried to set BGN mode to B mode only...still the same.
i tried to disable the wifi security password...still the same.

What's wrong?

as per your request ( ZTE MF680 + TL-MR3420 V1/V2 only )


ztw mf680 + v1 ( openwrt firmware )



zte mf680 + v2 ( TP LINK Stock firmware )

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Added on November 21, 2012, 10:31 pmif you are using V1 or V1.3, then that's normal, it happen to me once before,

you are using TPLINK stock firmware right ?

This post has been edited by chuahcs79: Nov 21 2012, 10:31 PM

dun why my connection so suck

ok , thx for the insight

right now I attached the panel to a 8ft-long pipe rod , and use idm with single connection to download a 2hr+ hd clip (metallica concert) from youtube , while downloading i rotate the pipe 360 degree , monitor the rssi and download speed .
from what i found out thus far , good rssi =/= good speed , -69dBm I get speed hovering at 600 to 750KB/s range while the other side with -83dBm could get me 1000 to 1200KB/s . I think I will just leave the pipe rod there , when downloading , rotate it and secure the position with the highest download speed

it is very obvious 2 different tower,

-69dBm tower is nearer but low speed

-83dBm tower much far away but high speed

check the CELL ID in MDMA, i believe is 2 different tower,

good signal dosnt guarantee good speed as i had mention before

it is all depends on the base station/ tower u are connected to whether is congested or not

these few days my speed sucks at night.... ping 200+ speed 0.5-2mbps

what mean by cell ID......?

you are right , bare 680 always connect me to the fastest one while panel prefer to get me strong signal but low speed , anyway to force panel to connect to fast cid ?

by the way , opensignalmaps shows me there are some more cid surrounding , I wonder why I couldn't locate them with modem/panel

it is tower cell identity

will it automatically revert back to normal again by itself?

sometimes it will, but most of the time it wont even i reboot,.

that's why i flash to Openwrt firmware, and set wireless G, all previous wifi issue with tplink stock firmware it gone now,..

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Added on November 22, 2012, 1:44 amwell

our modem tend to connect to the strongest SNR and lowest frequency ( if support UMTS900 & UMTS2100 both ) in band config AUTO mode,..

with antenna we can change that facts, just need a clear correct aim in direction and connection will be super stable.

bear in mind, antenna is not for increase speed purpose,.. only for consistency purpose

also not all cell tower broadcast high speed too,. some might be old tower with HSPA only

This post has been edited by chuahcs79: Nov 22 2012, 01:44 AM