This device is offered by certain cellphone/wireless carriers such as AT&T Wireless (in the US) and Rogers/Fido (in Canada). The monthly price varies but since I live in Canada, the version that I got to try was from Fido. Rogers has the exact same deal. The monthly charge for both Rogers and Fido is either $9.99 per month or $24.99 per month plus the applicable monthly taxes/fees. The $9.99 monthly price tag is to anyone with an existing service with the carrier and gives unlimited nationwide calling (no long distance fees). The $24.99 monthly price gives the same service except it is for people who don't have any services with the carrier. I'm not sure what the fee is for AT&T's wireless home phone service.
The way that the device works is that you insert the SIM card into the device (the device uses a normal mini-SIM), connect the battery to the device, and plug it into an electrical outlet. You then connect your household phone's RJ-11 cable to the device and start making/receiving your calls. According to the documentation, the battery will last for ~3 hours if not plugged into the AC outlet. I haven't tested the battery myself but based on my experience with advertised battery usage times, I would probably say divide that number in half. However, since it is meant to be a home phone, it should always be plugged into the AC outlet.
Since the plan that I tested came with unlimited nationwide calling at a very low price compared to regular cellular service, I tried the SIM in a regular cellphone to see what would happen and the phone would not lock onto the network with that SIM card but would lock onto the same network with a different SIM card from that same carrier.
Another reason that I put the SIM card into a regular cellphone was that I wanted to set up the SIM lock on the SIM card which is not possible to do using the ZTE WF720 Wireless Phone Device itself. After setting up the SIM lock on the SIM card, I inserted the SIM card back into the ZTE WF720 Wireless Phone Device and the phone that was connected to the device seemed to get a regular dial tone but calls could not be made from the phone. The only indication that the SIM lock was in effect was the flashing green battery indicator LED on the unit itself. After entering my SIM unlock code using the connected phone and pressing the # key, I could then make a phone call (and receive phone calls).
Although the device looks like it is a VoIP solution, it is in fact using the carrier's phone service in order to make and receive calls. I find the signal strength of the device to be good and the voice quality to be better than what I would get in the same location with my cellphone.
One thing that I wanted to write was that the device mentions that it will not work with satellite receivers, modems, fax machines, and home alarm system. I have not tested the device in any of the above items to see whether it will work or not.
For Canadians, depending on your needs and usage, I have no problem recommending this device with the price plan price of $10+taxes per month. The $25+taxes per month price tag might still be worthwhile depending on how much you pay for your home phone service and what you use your home phone service for.
In terms of the sound quality, I would say that that sound quality is equivalent to what you would get on a cellphone at the same location (or maybe slightly better). For me, even though I am using a regular landline phone connected to this device, I can still tell that you are not using a real landline since the sound quality is not as good as what I get with a real landline because sometimes the person's voice whom I'm talking with will sound a bit "robotic" and other times I will lose certain syllables/words during the conversation similar to what I would get with a handheld cellphone.
One of the good things about this device over a regular landline phone service is that it is easily transportable and since the plan covers unlimited nationwide calling as long as the device is within the carrier's cellular coverage area, it makes a good phone to take with you if you go to another part of the country temporarily.
What makes this device extremely attractive is that unlike in the US, in Canada, most cellphone plans don't include nationwide calling. What this means is that if someone with a Montreal area code goes to Toronto and receives a call on his Montreal cellphone, he/she will pay long distance to receive the call. If he/she makes a call back to Montreal while in Toronto (even though his phone has a Montreal area code), he/she will pay long distance to make the call. Using this device, all of this is ignored since while in Canada, you can receive a call without paying anything extra and you make a call to a Canadian number without paying anything extra.
For a copy of the ZTE WF720 Wireless Home Phone device manual, you can click *HERE*.
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