Compare T-Mobile vs. Sky Mobile Network

Features
Network Provider EE O2
Check network coverage: T-Mobile coverage Sky Mobile coverage
2G Network Yes Yes
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 No Yes
4th generation network. Max data speed of 1 Gbps (1000 Mb/s).
5G Network No Yes
5th generation network. Max data speed of 10 or 20 Gb/s.
WiFi Calling No Yes
Use Wi-Fi for mobile phone calls and texts when no network signal.
4G Calling (VoLTE) No Yes
Voice over LTE (4G Calling) makes clearer HD calls over 4G networks.
Data Rollover No Yes
Unused mobile data allowance rolled over from one month to the next.
Tethering Allowed No 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 / 1800 / 2100 / 2600 MHz 800 / 900 / 1800 / 2100 / 2300 MHz
3G (UMTS) Frequency 2100 MHz 900 / 2100 MHz
2G (GSM) Frequency 1800 MHz 900 MHz

T-Mobile UK is a mobile network operator in the United Kingdom, owned by Deutsche Telekom since 1999, and originally launched as One2One.

In 2009, Deutsche Telekom and Orange SA announced that the T-Mobile network was to be merged with Orange UK in a joint venture with EE Limited to form the UK's largest mobile network.

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.