How to upgrade an S9 refurb (esolutions webshop) from Android 8 to 9, 10, 11,

[egx470]

Some helpful info here.

Voice over internet capability

A Mobile Virtual Network Operator (MVNO) is nearly always going to be cheaper than the 4 major carriers whose networks they use, T-mobile, AT&T, Verizon, and Sprint (with the possible exception of cheap multi-line family plans). The main reason MVNOs are cheaper is because they don’t have to maintain stores, build cell towers, purchase spectrum, etc. The major networks benefit because they lease to the MVNOs and get paid for customers they might not normally get. Most MVNOs these days are as …