WCN3950 005 WiFi IC

When a phone comes into your shop with WiFi that refuses to turn on, or Bluetooth that keeps dropping mid-pairing, the WCN3950-005 is one of the first components worth checking on Qualcomm-based Xiaomi, Vivo, and Motorola boards. This chip is Qualcomm's single-die WLAN, Bluetooth, and FM combo solution, built to handle 1x1 802.11 a/b/g/n/ac WiFi standards together with Bluetooth 5.0 connectivity from a single BGA package soldered directly onto the motherboard.The "-005" marking is a minor revision code within the wider WCN3950 family, which also includes -003 and -004 variants depending on the phone batch and manufacturing run. Board layouts vary between these revisions, so always match the exact marking printed on the original chip before you order a replacement — swapping in the wrong revision on a board that expects a different one is a common cause of a dead-after-flash WiFi module.On your repair bench, this IC becomes the focus point in a fairly specific set of symptoms: a WiFi toggle that stays greyed out no matter what you do in settings, a phone that can't detect any networks even though the antenna and flex are fine, WiFi that connects but drops out repeatedly, or Bluetooth pairing that fails or disconnects on its own. If you've already ruled out a software issue with a factory reset or box flash and the fault persists, the WCN3950-005 is the next logical suspect rather than the antenna cable or the network IC.Because this is a WLNSP/BGA-style surface-mount device, it isn't something you swap with a soldering iron alone. You'll need a hot air rework station, a proper reballing setup with matched stencil, flux, and BGA balls, and a microscope or strong magnification to line up the pads correctly. Reflow temperature control matters here — overheating the surrounding components on a densely packed board is the easiest way to create a second fault while fixing the first. Always cross-check the board schematic for your specific model before you start, since pad orientation and keep-out areas differ slightly across devices that share this chip family.In terms of where this fits in the repair workflow, the WCN3950-005 sits alongside the power IC and baseband chip as one of the smaller BGA components technicians handle regularly. It's a common component in IC-level board repair for budget and mid-range Android phones, particularly where Qualcomm chipsets are paired with this connectivity module. Technicians running a service center in Pakistan will recognize this as the "WiFi wala IC" that comes up whenever a customer reports WiFi na chal raha or Bluetooth baar baar disconnect ho raha hai after ruling out software faults.This listing covers the WCN3950-005 IC only — it doesn't include the phone's WiFi antenna, flex cable, or any other board-level component. Stock supplied here is genuine and tested before it ships, which matters on a part where a bad chip means redoing the entire reballing job. Keep a few of these on hand if you're servicing a steady flow of Xiaomi or Vivo units, since WiFi/Bluetooth IC failure is a recurring fault across boards built around this chip.If you're unsure whether your board uses the -005 revision specifically, check the marking under magnification before ordering, or compare against your board schematic — using the wrong revision code on a mismatched board layout won't restore connectivity even after a clean reball.