Samsung
Network status may affect the final price. Unlocked devices typically have higher value.
Answer these questions to get an accurate price quote
Galaxy S21 Ultra 5G
Please complete the condition assessment to see your quote
We've bought over 1 million devices from customers with excellent customer satisfaction.
If the condition of your phone matches what you select, we guarantee we will pay you the price you see today. Quotes are valid for 24 hours, then locked for 5 days once you complete your order.
We constantly monitor competitor prices on a regular basis and aim to give you the highest value for your trade-in.
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Device Conditions
Grading system and condition requirements
Payment & Pricing
Payment methods, processing times, and pricing questions
Shipping & Postage
How to send your device, packaging, and tracking
Device Preparation
How to prepare your device before sending
Everything you need to know about selling your Samsung Galaxy S21 Ultra 5G.
A Samsung Galaxy S21 Ultra 5G is currently worth up to £130 at Cash My Tech. The exact figure depends on storage size and condition (Grade A–D); use the instant quote tool above for the precise amount, which is then guaranteed for 5 days.
Yes. We buy the Samsung Galaxy S21 Ultra 5G in any condition — cracked screen, faulty battery, water damage, or won't power on. Select the matching condition when quoting and you still receive a guaranteed offer rather than a £0 valuation.
Devices received and inspected before 2pm are paid the same working day by UK bank transfer (PayPal also available). Postage is free via a prepaid label, so the typical end-to-end time is 2–3 working days.
Yes. Every device is securely data-wiped to industry standards before resale, in line with UK GDPR and the WEEE Regulations 2013. We recommend you also sign out of your Apple/Google account and factory reset before posting.
Cash My Tech is rated 4.8/5 from 1250+ customer reviews. We offer free postage, same-day payment, and a 5-day price guarantee — and if a device arrives in better condition than described, we automatically pay more.
