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Siemens Gigaset

Siemens Gigaset S850A GO Quad

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Customer rating: 4.4 out of 5 | read 440 reviews or add a review

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Siemens Gigaset S850A GO Price incl. VAT £69.99

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Siemens Gigaset S850A with Long Range Price incl. VAT £144.99

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Future-proof: for landline and/or VoIP telephony Smartphone integration via Gigaset GO Headset connection via Bluetooth® or 2.5mm Picture Caller ID

Siemens Gigaset S850A GO Quad: A premium set of digital cordless phones for landline & VoIP

The Gigaset S850A Go Quad is the latest set of cordless phones from German manufacturer and comes with features designed to make your home phone future-proof with VoIP. Manufactured to the highest quality by Gigaset, each handset features a beautifully large 1.8” colour display and comes with style to match its performance. And with range of up to 50 metres indoors and up to 300 metres outdoors you’ll be able to enjoy calls throughout your home.

Future-proof with VoIP

Designed for longevity the Gigaset S850A GO Quad comes with a sophisticated hub that in addition to connecting to your standard analogue telephone line can also be connected to your router so that you can make calls over the internet.

Gigaset GO

Gigaset GO for Smartphone integration

Gigaset GO means that the S850A Go can be integrated with your smartphone so that you can be notified whenever there is a missed call or a message has been left on your home phone. And updating the contacts on your new phone has never been easier thanks to Gigaset’s innovative app for Android or iOS – Contacts Push. Once downloaded you’ll be able to synchronise contacts from your Smartphone seamlessly.


Call management

Store up to 500 contacts on the phonebook (with space for 3 numbers, email, and Picture for Caller ID per entry) and take advantage of your call history. The Gigaset S850A also gives you the power to block nuisance callers by adding specific numbers to a blacklist, and silencing incoming calls from withheld or anonymous numbers.

Gigaset S850A with Answering Machine

Integrated answering machine

Upon setting up the Gigaset S850A GO the integrated answering machine is activated, which provides up to 55 minutes of messages. There are also a further two answer machines available, which can be assigned to your VoIP lines. Each answering machine will only accept calls to the number (line) it is linked with. Messages can be played back from any of the handsets or even remotely from an external line after you have set a PIN.

Exceptional sound quality

Gigaset phones are renowned for their crystal clear sound quality and have consistently earned themselves a spot on the Which? Best Buy list. The S850A GO Quad is no exception with HDSP capable of providing high-definition call clarity over both landline and VoIP. You can also enjoy calls handsfree thanks to the full duplex loudspeaker or connecting a headset via Bluetooth or the 2.5mm socket.

Why should you buy these cordless phones?

The Gigaset S850A GO Quad is a high-quality set of digital cordless phones that deliver excellent sound quality, advanced features for the home, and reliable usability.

IP Features
No. of SIP accounts supported 6
No. of simultaneous/parallel calls supported up to 3
Multilingual user interface
Web portal for individual unit configuration
RTCP support
HD Voice
RJ45 LAN connection
For analogue line (BT, Virgin, TalkTalk, etc.)
For VoIP line
No of handsets 4
System can be expanded to 6 handsets in total
Answering machine Yes | Up to 55 Minutes
Phonebook Up to 500 entries
Keypad/touchsceen Yes | No
Caller ID (Display):
Wall mountable base | additional handsets No | Yes
Range indoors | outdoors in metres 50 | 300
Talk time | standby in hours 12 | 300
Warranty 2 years
Advanced Features
Anonymous call blocking/silencing Anonymous call silencing
Repeater compatible


Headset compatible
  • Via 2.5mm Headset Socket
  • Via GAP
  • Via Bluetooth
Large buttons/font No | Yes
Data synchronisation with Outlook via mini-USB and Bluetooth
Picture caller ID
Screen size | Backlit 1.8" | Yes
Colour Yes
Backlit/ Illuminated Keypad
Date & time
Screensavers pre-installed | downloadable Yes | Yes
Out of range indicator | alert Yes | Yes
Low battery indicator | alert Yes | Yes
Space per entry Up to 3 Numbers with first and last name; Email Address; Anniversary with reminder; VIP Ringtone; Picture for Caller ID
VIP contacts
Phonebook transfer
Additional features: Nuisance Call Blocking
Room/baby monitoring
Night Mode
HDSP Audio
Base Answering Machine
Record time 55
Remote access from outside line
SMS/email notification of new messages
Playback: handset| base Yes | No
Message counter indicator
Pre-recorded/ personalised outgoing message Yes | Yes
PIN protected
Protection of recording against power failure
Handset locator
Call management & sound
Call blocking
Call transfer between handsets
Call waiting
Conference call
Internal calls (intercom)
Hold | with music Yes | Yes
Last number redial
One-touch loudspeaker
Earpiece volume control 5 levels
Handsfree volume control
Call Duration displayed
List of last...missed calls with time/date 20
List of last...dialled numbers with time/date 20
Two-way recording
Ringtones: melodies| polyphonic | real | downloadable 22
Technical information
Talk time 12 hours
Standby time 200 hours +
Battery type NiMH
Battery size AAA
Transmission technology DECT & GAP
Frequency band 1.88 to 1.90 GHz
Languages Yes (27)
Why not save up and get great accessories? Select from additional handsets, wireless headphones, or go for extra long range with a DECT repeater

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Siemens Gigaset S850A GO Quad Siemens Gigaset S850A GO Quad

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of customers would recommend this product
Average Customer Review
more score details
Customers most agreed on the following
Good points
  • clear voice (62)
  • Easy to read screen (60)
  • Lightweight (52)
  • long lasting (37)
  • Big buttons (11)
Bad points
  • maximum volume is low (8)
  • None (7)
  • Expensive (2)
  • Design (2)
  • short battery life (2)

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The most helpful favorable review 195 of 202 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 4.7/5 Siemens Gigaset S795 Quad Cordless Phone "Solid, attractive and full of features Keys slightly difficult to read - small numbers and letters not distinctly printed." Read the full review › Jan 04, 2014 by Anonymous

The most helpful critical review 39 of 40 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 4.3/5 Excellent Upgrade - does what it says on the tin "Very good set of phones. Expensive yes, but you're paying for the style and the experience and it is worth it. It looks and feels like good quality, Ligo's service matches the quality - fast and efficient with plenty of ... Read the full review › Aug 04, 2014 by Anonymous

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Product Manuals Siemens Gigaset S850A GO Quad
Siemens Gigaset S850A GO Manual.pdf

Siemens Gigaset S850A GO Quad
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