My question is if this is a common problem or not? Will an exchange get me a Surface Pro that works correctly?
We purchased a Surface Pro 3 (i7-256GB) this past Friday to use and evaluate the system for a further project outlay. There are many things to like about the Surface Pro 3, but unfortunately the Wifi device inside the tablet seems to be seriously malfunctioning as you also described, although since the problems are repeated all the time, I don't know if the "sleep" function is contributing to the issues. Our system is repeatedly resetting the connection, losing all connections, and is running at extremely slow transfer rates.
I made a number of screenshots and video showing a laptop wifi status screen and the Surface Pro 3 wifi status screen on either side of a desk. The Surface shows 1.0Mbps, but the laptop (a 2005 Dell Vostro) is experiencing no issues and is running at 130 Mbps.
The test network was a Verizon FiOS setup using the Actiontec MI424WR-GEN3I router in 802.11n only mode. Our Surface Pro 3's lot number/date is 1428.
I realized this could be a minority problem, however, and therefore sent an email to our MS Corporate sales rep, but received no response as of now. I also called MS technical support on the telephone and the woman offered me a REFURBISHED replacement in the mail. I said I would return the product to the MS store before I accepted a refurb Surface for something I bought 3 days ago.
I would be really interested in some insight before I return the system.