For what it's worth, here's what I did with all my children and worked with no battle at all.
● They (3 children) were all between 3y6m and 4y10m when losing dummy, it was timed alongside dropping daytime naps. Dropping nap was the trigger for dropping dummy.
● From 12 months dummy in the cot only.
● From about 2.5y, start talking about dummy in child-friendly negative terms. It's babyish, you're too big for a dummy, you're getting a big/clever girl/boy now, you look silly with a dummy in your mouth, you don't need that.
● once dropped naps, get the Argos catalogue out and flick through together. No discussion why, but set a budget (I said £20) and look through seeing what child would want for that budget. Get several options, discuss them, narrow down to 1 special thing and enthuse about it. NO MENTION OF DUMMIES when doing this.
● After the imaginary £20 gift is chosen, suggest that you will buy him/her that as soon as she's done 7 days without dummy. Just conversationally, no pressure and no suggestion it needs to be now, just when ready.
● Mine have all said they wanted to get rid of dummy and get present within half an hour of that conversation. Do lots of "are you sure, it will be hard?". And say how proud you would be if they managed it.
● knock up a quick 7 day sticker chart (flower with 7 petals, picture of special gift in centre, for example) and some special big stickers.
● put on wall. Talk about it know terms of "when DC is ready we are going to start". Never any pressure that you (or anyone) is taking dummies away
● it's all about empowering the child to make their own decision to drop dummy. No pressure, no force.
● Come bedtime, talk about how proud you are. Any asking for dummy gets the responce "it will mean you don't get the special present, are you sure"?
● Child should know dummies are right there (downstairs) if wanted. They've not gone forever, not taken away. They are there, but child is choosing to now have one tonight.
● talk how proud you'd be if they managed just one night. That dummies are still there if needed tomorrow, but let's try tonight? Even go fetch a dummy if needed, but give loads of "get out chances" to still earn present if they don't have it.
It's been that straight forward with all mine. No crying or upset whatsoever - If crying for the dummy I would have given it them without hesitation. I never got that. The child choose to drop the dummy and I just heavily supported that decision of their own