Does anyone know of wholesale ISPs which provide SIMs with both voice (over SIP) and data (over L2TP)?
Currently I'm with Andrews&Arnolds but they don't provide L2TP handover on their voice SIMs, and their data sims do have this but not voice nor texts. Simwood looked promising but their wholesale MVNO went into administration so they are no more as far as mobile is concerned. AQL only do data, so they're out. Contacted Simetric which say they'll check with their engineers if they can provide this but it doesn't seem promising and the setup fees are prohibitive.