Any tips on recycling e-waste such as my old mobile phones?

There are e-bins under some hdb blocks nowadays! Good initiative

Again, going to the latest resources by NEA:

StarHub's RENEW (REcycling Nation's Electronic Waste) Programme

• you can definitely recycle your mobile phone, amongst other things like laptops, cables and plugs etc
• Best Denki, Courts, Gain City and Harvey Norman have joined the RENEW programme - so you can check them out for the RENEW bins!
• See the full list of RENEW bins here: https://www.starhub.com/about-us/corporate-sustainability/recycling-nations-electronic-waste.html

Singtel x SingPost E-Waste Recycling Programme

• with this programme, you can definitely recycle your mobile phone, amongst other things like laptops, cables and plugs etc AS LONG AS it fits into the deposit slot
• full list of their recycling bins here: http://recycle.sg/

There are many more options as well:

https://www.nea.gov.sg/our-services/waste-manag...