Help me save money on my kids mobile phones please

[plainjaneonthetrain]

I’d like my teenagers to start looking after their own phone bills. I’m happy to help out but I’ve ended up with all their phone contracts in my name as they were at school when we started them
As well as my own phone plan which is 8GB on Vodafone for £24
I pay for
DC1 working Vodafone 8 GB plan £24 with Vodafone
DC2 working part time 5GB plan with O2
DC3 at Uni 20GB plan plus insurance £44. O2 - she is a heavy data user as she is always on the bus! I’m not sure if she could get a contract with no credit rating etc

I don’t know if the phone are locked to networks. All the phones are paid for now.We went with these networks as they had reasonable reception in our rural area.

This is a job I’ve been meaning to do for years but quite honest I don’t know what I’m doing and still love my landline,

Please help me but in basic terms .
Thank you,

Jesus, why are you paying so much. I have a sim only deal with unlimited calls and texts and 4gb of data and I pay £6 a month on ID. Even with more data I wasn't paying more the £10. Tbh I would never ever go back to Vodafone.

No need to be rude, not everyone knows everything. I'm sure there are things the OP knows about that you don't

We own the mobiles outright and are SIM only PAYG with Asda (uses Vodafone network) on automatic renewal bundles. (we've never had contracts; always bought phones, usually second hand, and used SIM only plans)
£5/month - unlimited texts/minutes and 3G of data
£8/month - unlimited texts/minutes and 10G of data
(texts/minutes not good for some int'l though; check before roaming on holiday)

Phone insurance is through my flex plus account with N'wide so check your other policies and such b/c you may already have ins for your mobiles.

We buy the phone separately then buy a sim. Currently we use lebrara.

I moved from Ee to Spusuu, exactly the same contract/data and they use EEs network so basically exactly the same service. Reduced my contract from £30 a month to £8.90. Used ChatGPT to talk me through the switch over and it was really straightforward. I was just out of a 2 year contract.

My son has Giffgaff and it's £10 a month.

I am on 02 and thinking of switching over myself as I am paying £18. If I could use an e-sim on my phone I would have switched by now but changing the SIM is a PITA so I might do it when I next change my handset.

Its really easy to change,but giff gaff is not great value look at uswitch and you can stay with O2 and loads of other mobile companies for a lot less. I pay £8.00 for 50g on O2.

Im with smarty 200gb for £10 a month