Good Fengshui very important !!!!!!!

ok after few days testing, here is the review:

1. in door
without antenna : 93dbm
with antenna pointing to the tower: 88 dbm

2. out door
without antenna : 85 dbm
with antenna pointing to the tower: 73 dbm

3. high ground (roof top, i stay at single storey house)
without antenna :69 dbm
with antenna pointing to the tower:58 dbm

tips:

1. you really really really need to know where is the tower really are.
2. good signal =/= high speed.
3. you need a laptop with mdma and walk around to check on the signal like feng shui master

pros:
1. the antenna is light and easy setup
2. 2 meter cable is just nice
3. seller provide ultra good after sales service

cons:
1. the cable is hard to bend, the connector isnt easy to mount, need more effort on the cable mamagement.
2. seller sometime busy to contact
3. again, good signal doesnt mean good speed.
and one more thing: seller will tell you where is the tower located at your area. just pm him and pray for his reply.

yea my stability consistency after using antenna with zte mf680 is as high as 99% 

it is normal, when i start my IDm download sometimes ping will shoot up to 200~500ms, it is very normal especially when u uploading file,
my example:

[attachmentid=3161653]

ping will raise :

- when your Download & upload speed either one or both running nearly @ max ( Max in your available connection from your area base station )

- when u upload huge big file

- when tower congested/super busy

- when weather is super bad affected the SNR ( sound and noise ratio ) measurement  of your signal

just remember to limit any of your software upload speed, so your ping will be maintain low and Download speed will increase
before using panel antenna from blacktubi, ping even higher than what u see in screenshot, and now after using, ping consider much lower already during heavy Download session

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Added on November 18, 2012, 3:19 am

you should place the usb fan blowing from either of the zte mf680 side, can remove the sim card cover, it will help,..

blowing from the side of external antenna hole or the microsd memory card slot, the wind will penetrate better compare to just blowing like in your photo

sim card cover removed.