have u tried to use your other wireless device to connect it ? 

try to flush your DNS yet ?

if u follow the video tutor, it should be working as u finish complete,..

your other device connect via wireless can online ? 

well, if u want i can team viewer helping you to check,..

let me know by PM your team viewer ID & PASS 

sure, let me know,.. always ready to help 

Bar is never accurate

Use mdma to verify

come to dell bukit tengah then can reg meh? unless youre working in dell rite?

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Added on November 20, 2012, 7:31 pm

u offer 1K then ppl will sell   

Mr3420 + WR1043ND + 8dBi antenna

mf680, dun care hot as i dun hold it one   

there you go............

[attachmentid=3166191]

have you try your router with other usb modem ? 

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 pm

if you are using V1 or V1.3, then that's normal, it happen to me once before,

you are using TPLINK stock firmware right ? 

yea V2 at wireless N 300Mbps , the ping is as low as the Lan cable too 

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Added on November 22, 2012, 6:00 pm

your case is very easy to trouble shoot,

just bring your Combination Setup to other area,

if u are still getting 2.5Mbps same speed, something is wrong with your device or your sim QoS 

your zte mf680 on how many TX power ? original 23tx or ?

your router is V1 or V1.3 ? via lan cable or wifi G /N ?

stock firmware ? or opewrt ? 

you should try to tweak your zte mf680 to -> 26/27tx or if you adventures enough like me can tweak to 33tx

then openwrt under wifi select G only

and also plug in your computer use MDMA to tweak your zte mf680 on UMTS2100/GSM900& 1800 band config

then try again 

oh mine setup all running 24/7 like yours too,

but i do put a fan blowing at it,.. 

nope, seriously all DC-HSPA+ modem is really very hot inside on the panel heatsink,.. if u open up all cover, u will know it is all similar hot temperature,

why some modem didnt feel so hot compare to other, because of the cover quality built. it able to resist on heat more than others,

zte mf680 know as hot but actually E372 is equally hot too,. ( under both open cover tested by myself ).

the higher performances = the more power consume = more heat generate

so if need to put fan doesnt mean modem sucks ( similar standard to pc /laptop )

if pc and laptop need fan /water cooling/ thermal plate = meaning it sucks too ?