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TP-Link WA855RE vs TP-Link WA850RE : Which range extender should you buy?
The key difference between the two is that the TP-Link WA855RE features external adjustable antennas for slightly better range and directional control, while the TP-Link WA850RE uses internal antennas for a more compact, flush look against your wall socket. If you want better signal stability through walls, you should buy the WA855RE; if you prefer a lower-profile design that will not get bumped in tight spaces, you should buy the WA800RE.
Both models offer N300 single-band speeds and share the same internal performance capabilities. They both plug directly into a standard wall outlet, feature a single Fast Ethernet port for wired devices, and support quick WPS setup. Underneath the plastic casing, the core wireless hardware and maximum transmission speeds are virtually identical across both devices.
Because both options sit at a nearly identical price point, your choice comes down to placement and aesthetic preference. The WA850RE has a smooth, rounded body that sits flat against the wall, making it ideal for narrow hallways or outlets behind furniture. The WA855RE has two movable antennas on the sides, which allow you to angle the wireless signal toward specific rooms for slightly better performance across open layouts.
How the external vs internal antenna design can affect your extender performance
The WA855RE's external antennas can give it a modest edge in signal reach over the WA850RE's internal ones. TP-Link's own product pages confirm the hardware difference directly: the WA855RE ships with two antennas mounted outside the casing, while the WA850RE keeps its two antennas built into the plastic housing.
An antenna is simply the component that sends and receives the wireless signal.Antennas mounted outside the housing generally have a clearer, more direct path to the air around them, which is why most manufacturers treat external antennas as the better option for range.
If you're placing the extender somewhere the signal has to move through concrete, a metal door frame, or a thick load bearing wall, the WA855RE's external antennas give it a slightly better chance of holding a usable connection in that spot. If you're placing it somewhere with a relatively clear line of sight to the router,then the difference between the two designs will hardly be noticed day-to-day.
Setup and compatibility with Indian ISP routers
Both extenders pair to an existing router using a WPS button, a one touch pairing method most Indian ISP routers (from Jio, Airtel, ACT, and most cable operators) support out of the box. So you generally don't need to log into your router's settings to get the extender working. Both run on 100 to 240V input, which covers India's standard 230V supply without needing a separate adapter or worrying about voltage fluctuation damage, at least within the range the datasheets specify.
They may differ slightly in the app support. TP-Link's Tether, its free mobile app for managing extenders and routers, is documented for WA855RE, and appears on its marketing material as well. In contrast, the WA850RE model has gone through two or three internal revisions over its lifetime. So older firmware versions may lag behind on app features.
Consider their size before actual placement on the wall
The WA855RE is the more compact of the two. TP-Link's datasheet lists it at roughly 80 x 77.8 x 77.3mm depending on the hardware revision, while the WA850RE runs closer to 110.0 x 65.8 x 75.2mm. This difference is significant once you're plugging into a multi socket extension board, which is common in most Indian homes where the router and its nearby sockets are often shared with a TV, an inverter, or a cooler. So the bulkier WA850RE can end up blocking the socket next to it, and the WA855RE is less likely to do this.
Neither WA855RE nor WA850RE can extend the 5GHz network
This is worth clearing up first, 5GHz here is not the 5G mobile network technology that you may recognise from your phone. 5GHz refers to one of the two radio frequency bands a home Wi-Fi router can broadcast on, the other being 2.4GHz. The number is measured in gigahertz, a unit of radio frequency, not generation.
This said, both the WA855RE and the WA850RE are single band devices, and only talk to your router over 2.4GHz. So if your router is broadcasting a separate 5GHz network (which most dual band routers issued by Indian ISPs do automatically), neither of the two extenders can see it, connect to it, or rebroadcast it.
In practice, this may not matter as much. The 2.4GHz network has a lower ceiling on speed, but it travels further and passes through walls more easily than 5GHz, which is actually the frequency you want for range extension in the first place.
If however, you specifically need a fast 5GHz connection in the extended area, for a smart TV doing 4K streaming or a gaming console, these two extenders won't get you there, and you should consider a dual-band model instead. TP-Link's own support team has confirmed this directly to users on its community forums for both models, pointing them toward dual-band extenders like the RE200 or RE450.