Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: I just purchased an EW-7438RPn.  How can I upgrade the firmware of it? I could not find any firmware file for download on your web sites.
Document: Find the EW-7438RPn section3. Download firmware 1.27, and follow instructions provided by Edimax
I recently purchased a EW-7438RPn V2 to help boost the wireless signal in my home. The setup instructions were not clear so I called Edimax technical support and spoke with Jeffrey Cheng. He talked me through initiating the setup using my iPad, but it became clear I would need to upgrade the Extender's firmware first. Due to certain circumstances, I was not able to complete this at the time of the support call.
I purchased this item to boost the WIFI signal in my apartment and because I own an EW-7228RPn that has worked fine since it was installed.I was unable to install the unit using the WPS method. but was able to using the Web browser quick setup.After installation the unit worked very well, signal strength increased from 1-2 bars to 4-5 bars. after a day and a half the unit lost all internet connectivity.
If you were able to see the authorization pop-up, then it's all good and it's pretty straight-forward from this point.One tricky part was getting back into the web interface once I setup the extender (to change the default password and upgrade firmware if you wish to).Both extenderXXXX and 192.168.2.2 might not work anymore because the extender is no longer on that port(!).
This works fine after you download the firmware upgrade. Look to earlier reviews to learn how. Before the upgrade I had a weak signal. It improved greatly after. Also this extender is not for novices. It took me about three hours to work out the kinks. So if you do your do diligence and upgrade and have a working knowledge of how networking works it will do the job. And it does work with iOS. My iPad gets a strong signal now in my backyard.
I did this the previous night before receiving the Wi-Fi Extender. That way I had already located the most current version of the firmware (v1.27 at this time) in the Download page of their website and downloaded it to my laptop.I followed the instructions in the upgrade document and was able to successfully connect to my network. As a sanity check, after I had completed the installation I connected to the Edimax Extender with my android razr before powering down and relocating the extender.
After that, you can decide whether to use the extender network or router network to connect your computer to the Internet. (Likewise, you may need to turn your extender off and on again after the set-up. )After getting it set up, I also updated the firmware. You can download the latest ver. (as of today, it's 1.16) from the Edimax web site. However, that's not really necessary. The device works just fine w/ the ver.
After 6 hours of cussing and rising blood pressure I think I got it!I was able to get the unit hooked up and access the Web UI by way of the ethernet cable.I spent most of my time trying to access the Web UI, once I had it configured and restarted, with the wireless connection working. Nothing worked. Neither extenderxxxxxx or 192.168.2.2 would allow me access.I wanted to upgrade to the latest firmware.I then read the latest review by Tuan Linh.
I recently purchased this item here. To make a long story short, their excellent customer service (Julie, you're WONDERFUL!) got some info about my main WAP, and quickly determined that the problem likely was an incompatibility between their extender and the AP. EDiMAX's R&D team got right on it and issued a NEW firmware upgrade that did the trick!
I bought this a few months ago. Since then, it has had 2 firmware revisions. When I first set it up, I skipped the WPS function and went straight to the web page setup function. (I've disabled WPS in my router, as it's a security issue.) Plugged in the Edimax to an outlet and hooked up the ethernet cable to my laptop. Going into the 192.168.2.2 address, I got a manual setup page similar to what you'd find in a router.
Answer: Dear JC,There are two hardware versions of EW-7438RPn. They use different firmware, and the unit will fail if flash the wrong firmware. The reason why we remove firmware files from our website is to prevent customer flash the wrong version.Please contact Edimax directly if you are not sure which hardware version you have.If you have any questions, please contact our Live Tech Support Team at (408)988-6092 or email to "support@edimax.us." We are more than willing to help you with your concerns. Best regards,Edimax Tech Support Team