Any network offer similar to "Sure Signal"

[stoofa]

Do any other networks offer consumer level femtocell's similar to the Vodafone Sure Signal?
I live in an area that gets poor signal from nearly every mobile provider. I get around this with the Sure Signal, however that does rather limit me to Vodafone.
Just wondering if there are any other networks that offer similar?

Also, I love the idea of mobile over WiFi, that alone would defeat the requirement for a femtocell for me. However this only seems to be an option if I'm buying a handset at the same time - something to do with "special" builds of network software on handsets.
No network offering calls over Wi-Fi via SIM-Only I'm assuming?

 

[stoofa]

Thanks for the replies.
Very basically my "at home" coverage is terrible. I can make voice calls but there is always the risk it will drop out.
Our town is covered, but I seem to be on an "island of poor signal"

The Sure Signal has been great, cannot fault it. However if an app that allows me to do calls over wireless is available for some networks I'll be happy. I'm running a Nexus 5 and my wife a Moto G - so both relatively modern devices.

Vodafone are OK, but I've noticed recently I'll be stuck on an E or G connection when somebody with me will be flying around on 3G or H.

I currently pay £17/month for unlimited calls and text and 2GB data.
Any recommendations on best network for data coverage?
I've got free SIM's on the way from O2, 3 and EE to try - I'll do a one-off payment to each and walk around with the phone for a bit and check coverage.

 

[stoofa]

Thanks for all the posts. EE seems great, alas I don't have one of the flagship phones, nor does my wife - we tend to move networks together and it would be ideal to be able to retire the Sure Signal if we both moved away.
I have an old Nexus 5 and my wife a Moto G (3rd Gen) so they wouldn't work with EE.
At present it seems three is the best option as they have an app that would enable me to do WiFi calling on both our handsets.

I've got a three SIM ordered, so I can see what kind of general signal I get whilst out and about.