Compare SMARTY vs. T-Mobile Network

Features
Network Provider Three EE
Check network coverage: SMARTY coverage T-Mobile coverage
2G Network No 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 Yes No
4th generation network. Max data speed of 1 Gbps (1000 Mb/s).
5G Network No No
5th generation network. Max data speed of 10 or 20 Gb/s.
WiFi Calling Yes No
Use Wi-Fi for mobile phone calls and texts when no network signal.
4G Calling (VoLTE) Yes No
Voice over LTE (4G Calling) makes clearer HD calls over 4G networks.
Data Rollover No No
Unused mobile data allowance rolled over from one month to the next.
Tethering Allowed Yes No
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 / 1500 / 1800 / 2100 MHz 800 / 1800 / 2100 / 2600 MHz
3G (UMTS) Frequency 2100 MHz 2100 MHz
2G (GSM) Frequency N/A MHz 1800 MHz

SMARTY is a UK mobile virtual network operator running on the Three network. SMARTY offers SIM-only plans with no lengthy contracts or credit checks, and provides monthly discounts on unused data from previous months.

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.