Everything I need and great customer service!
The service has worked just as advertised. I use my number for international travel and it works really well. Support has been great when I’ve had questions. I would highly recommend.
By Vic
Sunday, November 8, 2026 · Customer reviews of US businesses
The Fair Hearing score
Average
84 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
SLYNUMBER is the easiest way to add a second mobile number to your phone - no SIM card or new device is needed.
SLYNUMBER (slynumber.com) has 84 customer reviews on The Fair Hearing, with an average rating of 3.2 out of 5.
Showing 43 reviews with 5 stars · Clear filters
The service has worked just as advertised. I use my number for international travel and it works really well. Support has been great when I’ve had questions. I would highly recommend.
By Vic
After arising unexpected error on my PC, I lost my slynumber, and I send email to need urgent help. In 10 mins, Slynumber recover my phone number. I really appreciated its assistance and kindness.
By Chase S.
I was having trouble sending messages, but the SLYNUMBER support team guided me step by step and quickly helped resolve the issue. The app works smoothly for receiving and sending messages once set up correctly. Great service and responsive support team — thank you!
By Martin M.
SLYNUMBER is a great service, I searched many other alternatives and used some of them but they are the fastest and most trustable till now. Support also very fast, which is important for me.
By Dijital M.
Problem was solve immediately I just send an email and in matter of seconds everything solve and very friendly. Shout to Dee, Amazing service
By Alexis V.
Nice services.
By Yi
Customer service is very responsive and resolved my issue so fast. That really means something! This company really cares about their customers and they really want to make their product the best for their customers.
By Dawn
Bottom line, it works.
By Dennis C.