As we know PTCL’s EVO (also called EVDO) service is out there, but reportedly it offers irregular coverage (besides Islamabad) – resulting many EVO customers returning their USB devices within 3 days.
(BTW, PTCL allows you to return EVO device with-in 3 days, in case of no signals at your home/office, or if you are not satisfied with the service – though you won’t be given cash instantly, you will have to wait for a month before you get your amount back in form of cheque)
Faisal Mehmood, has derived couple of mechanisms to increase signal strength of PTCL EVO device – following steps told by Faisal, can not only enhance signal strength but will also increase speed of your PTCL EVO.
Get a CD with both sides empty (meaning no sticker on either side) and flip it over to EVO device’s antenna
Faisal writes on his blog,
You will need a thin wire (preferably silver or copper). To get started turn the wires around the antenna, so as to form a spiral around it as shown. The top part should stick out about 10 cms, and then you will need to add some more spirals (three or four) such that they are roughly 5 cm. After that you need to leave a straight wire about 1.5 cm in length.
To turn the wire, I would suggest you twist it around a pencil or pen and then adjust the spiral distance by hand.