Compare Sky Mobile vs. iD Mobile Network

Features
Network Provider O2 Three
Check network coverage: Sky Mobile coverage iD Mobile coverage
2G Network Yes No
2nd generation network. Max data speed of 0.3 Mb per second.
3G Network Yes Yes
3rd generation network. Max data speed of 42 Mbps.
4G Network Yes Yes
4th generation network. Max data speed of 1 Gbps (1000 Mb/s).
5G Network Yes No
5th generation network. Max data speed of 10 or 20 Gb/s.
WiFi Calling Yes Yes
Use Wi-Fi for mobile phone calls and texts when no network signal.
4G Calling (VoLTE) Yes Yes
Voice over LTE (4G Calling) makes clearer HD calls over 4G networks.
Data Rollover Yes Yes
Unused mobile data allowance rolled over from one month to the next.
Tethering Allowed Yes Yes
Tethering allows you to share your mobile internet with other devices.
Network Frequency Bands
5G (NR) Frequency 3500 MHz 3500 MHz
4G (LTE) Frequency 800 / 900 / 1800 / 2100 / 2300 MHz 800 / 1500 / 1800 / 2100 MHz
3G (UMTS) Frequency 900 / 2100 MHz 2100 MHz
2G (GSM) Frequency 900 MHz N/A MHz

Launched to the public in January 2017, Sky Mobile operates as a full MVNO (Mobile Virtual Network Operator) within the UK, utilising the O2 radio access network infrastructure.

iD Mobile is a mobile virtual network operator (MVNO) operating in the United Kingdom as iD Mobile Limited, using the Three network. It is owned by Carphone Warehouse and was launched on 12 May 2015.

iD only offers 4G pay-monthly contracts for 12 or 24 months (with a handset) , monthly 30-day rolling or Pay-as-you-go SIM-only deals.