EVDOinfo Tip of the Week #3: "Supercharged" EVDO

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Monday, 27 April 2009

tip of the week by has long been your source for tips, tricks, hacks and suggestions for getting the most out of your EVDO service, and each week we will be highlighting a particularly interesting or popular topic in the "Tip of the Week" feature. To suggest future Tips of the Week, contact us at or post your suggestions in the EVDO Forums.



"SuperCharge" Your EVDO

One of the most popular threads on the EVDO Forums over the past few years has been the SuperCharged EVDO Performance tip, which discusses how to use Venturi Compression and adjust the TCP Receive Window Size to optimize the performance of your EVDO service. In the early days of EVDO certain businesses were charging for these FREE tips, but the truth is that any PC-user can download the appopriate the software and make the necessary adjustments easily and at no charge!

The original "Supercharged" tip involved using Venturi compression, which worked with older versions of Verizon's VZAccess Manager. Since the new versions of VZAM no longer use Venturi, that part of the tip is outdated and unnecessary. To improve your Sprint OR Verizon broadband card's performance, you can use a FREE utility to adjust the TCP Receive Window Size.

Please note that unfortunately this tip is for WINDOWS COMPUTERS ONLY.

1) Before beginning, connect your Sprint or Verizon aircard and do a speedtest at Note your download and upload speeds for future comparisons.

2) Download a FREE copy of Dr TCP from Broadband Reports:

3) With your Sprint or Verizon aircard connected, open the Dr TCP program, which will look like this (as long as your aircard is connected, your modem should automatically be selected under "Adapter Settings"):

dr tcp

4) Change the Tcp Receive Window value to "65536". Hit SAVE.

5) Go back to and run another speedtest. Compare to your previous speeds and enjoy!

Here are our most recent results utilizing this tip:

Verizon Wireless, USB720, Windows XP, -45 dBm

Before TCP Receiver Window Size

After TCP Receiver Window Size

Sprint, CDU680, Windows XP, -57 dBm

Before TCP Receiver Window Size

After TCP Receiver Window Size


For most users, we recommend leaving the rest of the Dr TCP settings along and only adjusting the TCP value. However, if you are an advanced user or are simply interested in learning more about TCP and MTU, there are a plethora of articles on Google that can be found via the following link: TCP and MTU.

Related links:

Last Updated ( Thursday, 04 March 2010 )
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