I have an olc HTC Desire OS 2.2 with an Orange T-mobile PAYG sim.
Added APN to use data; seems to work however having trouble tracking sim useage.
Firstly EE advise adding their app; Playstore says app incompatible with device.
I topped up £10 on 22/10/2016 and have used phone very little; just tests really. Today told £0 credit so added another £10.
Using add-on.ee.co to try to track useage but, after several hours since top up still showing £0 balance.
What is my best option to check my balance?