I don't know what exactly is inside a Hame A15.
Do you have a telnet access with the mtd_write utility available like on the Mifi-F5?
How much RAM do you have, 16 or 32MB?
And as a backup, I suggest you to be ready to use a soldering iron, just in case
I managed to connect to my Hame A15 via telnet and I have the mtd_write utility.
Concerning RAM, i think it has 16MB; this is the result of "cat /proc/meminfo":
# cat /proc/meminfo MemTotal: 13832 kB MemFree: 1060 kB Buffers: 844 kB Cached: 4020 kB SwapCached: 0 kB Active: 5436 kB Inactive: 1148 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 1748 kB Mapped: 1712 kB Slab: 3768 kB SReclaimable: 628 kB SUnreclaim: 3140 kB PageTables: 176 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 6916 kB Committed_AS: 3592 kB VmallocTotal: 1048404 kB VmallocUsed: 2176 kB VmallocChunk: 1045200 kB