Compare SMARTY vs. giffgaff Network

Features
Network Provider Three O2
Check network coverage: SMARTY coverage giffgaff 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 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 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 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 / 1500 / 1800 / 2100 MHz 800 / 900 / 1800 / 2100 / 2300 MHz
3G (UMTS) Frequency 2100 MHz 900 / 2100 MHz
2G (GSM) Frequency N/A MHz 900 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.

giffgaff is a mobile telephone network running as a Mobile Virtual Network Operator (MVNO) using the United Kingdom O2 network. Owned by O2's owners Telefónica, giffgaff was launched on 25 November 2009.