I was with Zen some years ago, but left because of excessive phone call charges. After wandering cloudland I returned to Zen last month because they now can provide SOGEA and I can use VOIP with provider of my choice. Thought I would sign up while their 'fixed price for life' offer was still valid (As I type most of the big boys are adding a 10% price hike even to their 'fixed price' deals...)
Connection is better than with all other providers. Had an issue with billing (my browser crashed during sign up and I ended up with two accounts). Support answered within 30 seconds. Staff speak clearly and very knowledgeable. Sorted out the billing issue. Transferred me to the technical who quickly resolved the database issue.
I'm using the Fritzbox with a couple of third party DECT Cat IQ2.0 handsets. I use third party VOIP provider. The Fritzbox is a good and flexible router/answerphone base station. With a bit of configuration its possibe to 'whitelist' my contacts to avoid spam. I'm also planning to get a second Fritzbox from ebay to set up a mesh system around the house and garden.
Dont understand previous couple of reviews who complain about poor support - perhaps the call centre got hit by Covid. They are certainly way better than many of the bigger providers.
Time With Provider: 15 Weeks
Package Name: Unlimited Fibre 1