The model is G8441 and it's running Android 9 with 32Gb of internal storage. I don't know what the maximum sd card size is but it ran a 256Gb with no problems. This is a genuine UK model and it really is in pristine condition including the battery.
eBay
LCD For SONY Xperia XZ1 Compact Display Touch Screen Replacement for SONY Xperia XZ1 Compact Mini LCD G8441 G8442 Screen
Aliexpress UK
✔️ Sony Xperia XZ1 Compact - Unlocked Phone. This is a fully working, original Sony Xperia device. It will have scratches on it, but it's beenprofessionally tested by our expert team. Changed your mind?.
eBay
Case for Sony Xperia XZ1 TPU Silicone Durable Clear Transparent Soft Case for Sony Xperia XZ1 Compact Phone protective Back Cove
Aliexpress UK
Unlocked to any Network apart from 3 UK as it may not work with it.
eBay
Original Sony Xperia XZ1 Compact G8441 SO-02K 4G Mobile Phone 4.6" 4GB RAM 32GB ROM Snapdragon 835 Octa-Core Android CellPhone
Aliexpress UK
Unlocked to any Network (apart from 3 UK Network as it will not work with it).
eBay
Aocarmo Top Ear Speaker Earpiece Dust Mesh Holder With Adhesive Sticker Glue For SONY Xperia XZ1 Compact XZ1C Mini G8441 G8442
Aliexpress UK
Unlocked to any Network apart from 3 UK as it will not work with it or any network that runs on Three UK. Physically Phone has scratches on Screen/back and sign of use on the sides.
eBay
Sony Xperia XZ1 Compact 4G G8441 SO-02K Original Unlocked Octa-core 4.6" 32GB 4GB Snapdragon 19MP Fingerprint Smartphone
Aliexpress UK
Feel free to ask any questions. Price is fixed not open to offers unfortunately as hard to find phone and runs still so smooth
eBay
For Sony Xperia XA1 XA2 XA3 Ultra Plus L1 L2 L3 Pro-i Silicone Case Luxury Carbon Fiber Cover for Xperia XZ1 XZ2 Compact XZ3 XZ5
Aliexpress UK
Sony Xperia XZ1 Compact / Mini Model . Will do our best to solve it. We are happy to help you out.
eBay
Leather case For Sony Xperia XZ1 / XZ1 Compact 4.6" & 5.2" Flip case card holder Holster Magnetic attraction Cover Wallet Case
Aliexpress UK
G8441 is global version, it supports NFC. Full Set 1 Earphone. 1 Battery.
eBay
For Sony Xperia XZ3 XZ1 XZ2 Premium Case Carbon fiber Cover Shockproof Phone Cases For Sony Xperia XZ2 Compact XZ1 Back cover
Aliexpress UK